LOCAL PROTECTIVE SIGNALING SYSTEMS 1967 handbook/NFPA 72A 1967.pdf · Local Protective Signaling Systems for Watchman, Fire Alarm and Supervisory Service NFPA No. 72A~ 1967 A device

NFPA No.

7 2 A

LOCAL PROTECTIVE S I G N A L I N G SYSTEMS 1967

NFPA

Licensed to U.S. Dept. of Labor, MSHA, Dist. 3, Morgantown, WV. Only one paper copy may be printed. Networking not permitted.

O f f i c i a l N F P A Definit ions

Adopted Jan. 23, 1964: Revised Dec. 9, 1969. Where variances to these definitions are found, efforts to eliminate such conflicts arc in process.

SHALL is i n t e n d e d to i n d i c a t e r e q u i r e m e n t s .

SHOULD is i n t e n d e d to i n d i c a t e r e c o m m e n d a t i o n s o r t h a t w h i c h is a d v i s e d b u t n o t r e q u i r e d .

APPROVED m e a n s a c c e p t a b l e to t h e a u t h o r i t y h a v i n g j u r i sd i c t i on . T h e N a t i o n a l F i re P r o t e c t i o n A s s o c i a t i o n does n o t a p p r o v e , i n s p e c t o r ce r t i fy a n y i n s t a l l a t i o n s , p rocedures , e q u i p m e n t o r m a t e r i a l s n o r does i t a p p r o v e o r e v a l u a t e t e s t i ng l a b o r a - t e r ies . I n d e t e r m i n i n g the a c c e p t a b i l i t y of i n s t a l l a t i o n s or p rocedu re s , e q u i p m e n t o r ma te r i a l s , t h e a u t h o r i t y h a v i n g j u r i s d i c t i o n m a y base a c c e p t a n c e o n c o m p l i a n c e w i t h N F P A or o t h e r a p p r o p r i a t e s t a n d a r d s . I n t he a b s e n c e of s u c h s t a n d a r d s , sa id a u t h o r i t y m a y r e q u i r e e v i d e n c e of p r o p e r i n s t a l l a t i on , p r o c e d u r e o r use . T h e a u t h o r i t y h a v i n g j u r i s d i c t i o n m a y a l so re fer to t he l i s t ings o r l a b e l i n g p r a c t i c e s of n a t i o n a l l y r ecogn ized t e s t i ng l abo ra to r i e s , * i .e . , l a b o r a t o r i e s qual i f ied a n d e q u i p p e d to c o n d u c t t he n e c e s s a r y tes ts , in a pos i t i on to d e t e r m i n e c o m p l i a n c e w i th a p - p r o p r i a t e s t a n d a r d s for t he c u r r e n t p r o d u c t i o n of l i s t ed i t ems , a n d the s a t i s f a c t o r y p e r f o r m a n c e of s u c h e q u i p m e n t o r m a t e r i a l s in a c t u a l u s a g e .

*Among the laboratories nationally recognized by the authorities having jurisdiction in the United States and Canada are the Underwriters ' Laboratories, Inc., the Factory Mutual Research Corp., the American Gas Association Laboratories, the Underwriters ' Laboratories of Canada, the Canadian Standards Association Testing Laboratories, and the Canadian Gas Association Approvals Division.

LISTED: E q u i p m e n t o r m a t e r i a l s i n c l u d e d in a l i s t p u b l i s h e d b y a n a t i o n a l l y r ecogn ized t e s t i ng l a b o r a t o r y t h a t m a i n t a i n s pe r iod ic i n s p e c t i o n of p r o d u c t i o n of l i s t ed e q u i p m e n t o r m a t e r i a l s , a n d w h o s e l i s t ing s t a t e s e i t he r t h a t t he e q u i p m e n t o r m a t e r i a l m e e t s n a t i o n a l l y r ecogn ized s t a n d a r d s o r h a s been t e s t e d a n d f o u n d s u i t a b l e for u se in a specif ied m a n n e r .

LABELED : E q u i p m e n t or m a t e r i a l s to w h i c h h a s been a t t a c h e d a label , s y m b o l or o t h e r i d e n t i f y i n g m a r k of a n a t i o n a l l y r ecogn ized t e s t i ng l a b o r a t o r y t h a t m a i n - t a i n s pe r iod ic i n s p e c t i o n of p r o d u c t i o n of l abe l ed e q u i p m e n t o r m a t e r i a l s , a n d b y whose l a b e l i n g is i n d i c a t e d c o m p l i a n c e w i t h n a t i o n a l l y r ecogn ized s t a n d a r d s o r t e s t s t o d e t e r m i n e s u i t a b l e u s a g e in a specif ied m a n n e r .

AUTHORITY HAVING JURISDICTION: T h e o r g a n i z a t i o n , office o r i n d i v i d u a l re - spons ib le f o r " a p p r o v i n g " e q u i p m e n t , a n i n s t a l l a t i on , o r a p r o c e d u r e .

S t a t e m e n t on N F P A P r o c e d u r e s This material has been developed in the interest of safety to life and property under the

published procedures of the National Fire Protection Association. These procedures are designed to assure the appointment of technically competent Committees having balanced representation from those vitally interested and active in the areas with which the Committees are concerned. These procedures provide tha t all Committee recommendations shall be published prior to action on them by the Association itself and tha t following this publication these recommendations shall be presented for adoption to the Annual Meeting of the Association where anyone in at tendance, member or not, may present his views. While these procedures assure the highest degree of care, neither the National Fire Protection Association, its members, nor ~ hose participating in its activities accepts any liability resulting from compliance or non- compliance with the provisions given herein, for any restrictions imposed on materials or processes, or for the completeness of the text.

Copyright and Republ i shing Rights T h i s p u b l i c a t i o n is c o p y r i g h t e d © b y t h e N a t i o n a l F i re P r o t e c t i o n Asso-

c i a t i on . P e r m i s s i o n is g r a n t e d to r e p u b l i s h in full t h e m a t e r i a l he r e in in laws , o r d i n a n c e s , r egu la t i ons , a d m i n i s t r a t i v e o r d e r s o r s imi l a r d o c u m e n t s i s sued b y pub l i c a u t h o r i t i e s . All o t h e r s des i r i ng pe rmis s ion to r e p r o d u c e t h i s m a t e r i a l in whole o r in p a r t sha l l c o n s u l t t h e N a t i o n a l F i re P r o t e c t i o n Assoc i a t i on .


72A-1

Standard for the

Installation, Maintenance and Use of

Local Protective Signaling Systems

for Watchman, Fire Alarm and Supervisory Service

NFPA No. 7 2 A m 1967

1967 Edition of No. 72A

The 1967 edition of this Standard incorporates changes prepared by the Sectional Committee on Detection and Signaling Systems. It was officially adopted by the Na- tional Fire Protection Association at the May, 1967 Annual Meeting in Boston, Mass., on the recommendation of the Correlating Committee on Signaling Systems. The prin- cipal additions to the Standard extend the revised wiring requirements of No. 71 to No. 72A. There are also revisions affecting gas-operated systems (Paragraphs 2432 and 2433).

Origin and Development of No. 72A

This standard has a long history dating back to 1898. Originally, Local Protective Signaling Systems was covered in a general NFPA standard on signaling systems but this material was separated from the other types of systems in 1964 as part of a program designed to simplify the guidance being offered. Companion NFPA Standards are: Central Station Protective Signaling Systems (No. 71), Auxiliary Protective Signaling Systems (No. 72B), Remote Station Signaling Systems (No. 72C), Proprietary Protective Sig- naling Systems (No. 72D), and Municipal Fire Alarm Sys- tems (No. 73). A record of the history of these standards can be found in the NFPA "Advance Reports" and "Pro- ceedings" during the years when action was taken.

Sectional Committee on Detection and Signaling Systems Alan Stevens, Chairman,

L i b e r t y M u t u a l I n s u r a n c e Co., 175 B e r k e l e y St. , Bos ton , Mass . 02117

George A. Smith, J r . , Secretary, C e n t r a l S t a t i o n A l a r m C o m p a n y , 610 N. A k a r d St. , Da l l a s , T e x a s 75221

( rep. I n s t i t u t e of E l e c t r i c a l a n d E l e c t r o n i c s E n g i n e e r s )

Benjamin B. Aycock, South-Eastern H e n r y G. Bone, J r . , T h e B o e i n g Corn- U n d e r w r i t e r s Assn . p a n y .

G. E. B e r g l u n d , F o r d M o t o r Corn- N . E . C a r l s o n , A D T C o m p a n y , Inc . p a n y . K . M. Dix , S c h i r m e r E n g i n e e r i n g

Corp . H . C. B i g g l e s t o n e , Pac i f i c F i r e R a t i n g W i l l i a m Ect i les , P h i l a d e l p h i a F i r e

B u r e a u . D e p a r t m e n t .


72A-2 LOCAL PROTECTIVE SIGNALING SYSTEMS

J . W. F lo t ron , J r . , A u t o m a t i c F i r e A l a r m Assn.

S. K. Goodwin, F a c t o r y I n s u r a n c e Assn.

Harold Gray , J r . , Cent ra l S ta t ion Elec t r ica l P ro t ec t i on Assn.

F. E. Guiber t , Na t iona l B u r g l a r & F i r e A l a r m Assn. Inc.

S idney J a c o b y , G a s - O p e r a t e d A l a r m I n d u s t r y .

H . V. K e e p e r s , F i r e P r e v e n t i o n & E n g i n e e r i n g B u r e a u of Texas .

E d w a r d A. Mar sden , U n d e r w r i t e r s ' L a b o r a t o r i e s of Canada.

O. J . Moses, F a c t o r y Mutua l Engi- n e e r i n g Corpora t ion .

Sam R a b e r , P y r o t r o n i c s Inc. G. R. R a n g a n a t h , Canad ian Elec t r ica l

M a n u f a c t u r e r s Assn.

James H. Riopelle , F i r e M a r s h a l s Assn. of Nor th Amer ica .

E. S. Ru th , Na t iona l Elec t r ica l Code Commit tee , Code-Making Pan e l No. 16.

George W . Saunders , U n d e r w r i t e r s ' L a b o r a t o r i e s , Inc.

W. F . Sehucha rd , Na t iona l E lec t r ica l M a n u f a c t u r e r s Assn.

George V. Stafford, I m p r o v e d R i sk Mutuals.

J a m e s D. Taylor , Genera l Mo~tors Corp.

Rei B. Wool ley , I n t e r n a t i o n a l Assn. of F i r e Chiefs.

Alternate .

Norbert J . P a t e k , F a c t o r y I n s u r a n c e Assn. (A l t e rna t e to S. K. Goodwin . )

Corresponding Nternberst Clive A. Hogan , W o r m a l d Bros. (Aust . ) , P ty . , Ltd . , Wate r loo , Sydney , N.S.W.,

Aus t ra l i a . R. W. P i cka rd , F i r e Offices Commit tee , London, E n g l a n d .

Scopz: Covers r e q u i r e m e n t s for the p r o p e r ins ta l la t ion, opera t ion , and m a i n t e n a n c e of all t ypes of s y s t e m s i n t e r c onne c t i ng de tec t ion and sens ing devices w i th a l a r m - s o u n d i n g e q u i p m e n t of the p r o p e r types ( inc lud ing l o c a l p r o p r i e t a r y , aux i l i a ry , r e m o t e s t a t ion a nd cen t ra l s ta t ion s y s t e m s ) an d to develop s t a n d a r d s on m a n u a l fire a l a r m s y s t e m s and w a t c h m e n services. Re- po r t s to the Assoc ia t ion t h r o u g h the S igna l ing S ys t e ms Cor re l a t ing Commit tee .

t N o n - v o t i n g m e m b e r .

Committee on Signaling Systems Correlating Committee

Carol E. R u r t n e r , Chairman, The Boeing Company , Aerospace Group, P. O. Box 3707, Seatt le , Wash . 98124

Norman E. Carlson, Secretary, A D T Company , Inc. , 155 Sixth Avenue, Ne w York, N. Y. 10013

J . R o b e r t A d a m s , T he At lan t ic Com- panies .

J . W. F lo t ron , J r . , A u toma t i c F i r e A l a r m Assn.

Chief W. C. McDade, San ta Monica F i r e D e p a r t m e n t .

E. P. Reid, Cha i rman , Sect ional Com- mi t t ee on Detec t ion Devices.

E. S. Ru th , Na t iona l Elec t r ica l Code Commit tee .

George Saunders , U n d e r w r i t e r s ' Lab- ora tor ies , Inc.

Alan Stevens, Chai rman , Sect ional Commi t t ee on Detec t ion and Sig- na l ing Sys tems .

Note : Also, C h a i r m a n of Sect ional Commi t t ee on Municipal F i r e A l a r m S y s t e m s

ScoPE: This Commi t t ee se rves as a p o l i c y - m a k i n g and co r r e l a t i n g g ro u p to a d m i n i s t e r and process r e po r t s of the va r ious Sect ional Commi t t ee s deal- ing wi th s igna l in G s y s t e m s and de tec t ion devices. All codes, s t a n d a r d s , r e c o m m e n d e d prac t i ces and m a n u a l s p r e p a r e d by the Sect ional Commi t t ee s an d h a v i n g rece ived a t leas t a t w o - t h i r d s a f f i rmat ive ba l lo t f r o m the vo t ing m e m - be r s of the respons ib le Sect ional Commi t t ee a re p rocessed t h r o u g h th is Com- mi t t ee p r io r to submis s ion to the Associa t ion for action.


CONTENTS 72A-3

Chapter 1.

100.

Chapter

200.

210.

220.

230.

240.

25O.

260.

270.

Chapter

300.

310.

320.

330.

340.

350.

360.

370.

C O N T E N T S

General

Definit ions . . . . . . . . . . . . . . . . . . . . . . . . . . . 72A-4

2. Common Requirements

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72A-7

W i r i n g . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72A-10

P o w e r Supp ly Sources . . . . . . . . . . . . . . . . . 72A-14

O v e r c u r r e n t P r o t e c t i o n . . . . . . . . . . . . . . . . . 72A-21

Elect r ical Superv is ion . . . . . . . . . . . . . . . . . . 72A-21

Audible S igna l ing Appl iances . . . . . . . . . . . 72A-24

Signal Capac i ty of Circui ts . . . . . . . . . . . . . 72A-25

Combina t ion Sys tems . . . . . . . . . . . . . . . . . . 72A-26

3. Types of Signaling Services

Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72A-28

Manual F i re A l a r m Service . . . . . . . . . . . . . 72A-28

W a t c h m a n ' s T o u r Supe rv i so ry Service . . . 72A-29

Miscellaneous Sys tems . . . . . . . . . . . . . . . . . 72A-30

A u t o m a t i c F i r e Detect ion and A l a r m Ser- vice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72A-31

Spr ink le r Sys tem Wate r f low A l a r m Service 72A-33

Spr ink le r Sys tem Supe rv i so ry Service . . . . 72A-35

A u t o m a t i c Smoke A l a r m Service . . . . . . . . 72A-37



Standard for the

Installation, Maintenance, and Use of

Local Protective Signaling Systems for Watchman, Fire Alarm and Supervisory Service

NFPA No. 7 2 A ~ 1967

A device or system having materials or forms different f rom those detailed in this s tandard may be examined and tested according to the intent of the s tandard and if found equivalent may be approved.

CHAPTER 1. GENERAL

ARTICLE 100. DEFINITIONS.

Throughout this s tandard the following meanings are intended:

Alarm Signal. A signal indicating an emergency requiring immediate action, as an alarm for fire f rom a manual box, a waterflow alarm, an alarm for an automatic fire alarm system, or other emergency signal.

Supervisory Signal. A signal indicating the need of action in connection with the supervision of watchmen, sprinkler and other extinguishing sys tems or equipment, or with the maintenance fea tures of other protective systems.

Trouble Signal. A signal indicating trouble of any nature, such as a circuit break or ground, occurring in the devices or wir ing associated with a protective signaling system. In a compressed or liquefied gas-type system, the trouble signal indicates trouble of any nature, such as a break or a leak in the tanks, devices, or tubing of the system.

Protective Systems, Equipment or Apparatus. Auto- matic sprinklers, standpipes, carbon-dioxide systems, automatic covers, and other devices used for extinguishing fires and for controlling tempera tures or other conditions danger- ous to life or property.

Protective Signaling Systems. Electrically operated circuits, instruments, and devices, together with the neces-


DEFINITIONS 72A-5

sary electrical energy, designed to transmit alarms and supervisory and trouble signals, necessary for the protection of life and property. In a compressed or liquefied gas-type system, pressure-operated instruments and devices, together with the necessary compressed gas energy, to accomplish the same purpose, are used.

Alarm Service. The service required following the manual operation of a fire alarm box, the transmission of an alarm indicating the operation of protective equipment or systems, such as an alarm from waterflow in a sprinkler system, the discharge of carbon dioxide, the detection of smoke, the detection of excessive heat, or the transmission of an alarm from other protective systems.

Supervisory Service. The service required to assure performance of watch patrols and the operative condition of automatic sprinkler systems and of other systems for the protection of life and property.

Maintenance. Repair service, including periodically recurrent inspections and tests, required to keep the protective signaling system and its component parts in an operative condition at all times, together with replacement of the system or of its components, when for any reason they become undependable or inoperative.

Local System. A local system is one which produces a signal at the premises protected.

Local Alarm System. A local system sounding an alarm as the result of the manual operation of a fire alarm box or of the operation of protection equipment or systems, such as, water flowing in a sprinkler system, the discharge of carbon dioxide, the detection of smoke or the detection of heat.

Local Supervisory System. A local system arranged to supervise the performance of watch patrols, or the operative condition of automatic sprinkler systems or of other systems for the protection of life and property against the fire hazard.

Process Monitoring Alarm System. An alarm system used to supervise the functioning of a commercial process, such as manufacturing operations, heating or refrigerating


7 2 A - 6 .LOCAL PROTECTIVE SIGNALING SYSTEMS

systems temperature control, etc., when failure of the supervised process could result in fire or explosion endangering life or property.

Combination System. A local protective signaling system for fire alarm, supervisory or watchman service whose components may be used in whole or in part in common with a nonfire-emergency signaling system, such as a paging system, a musical program system, or a process monitoring service system, without degradation of or hazard to the protective signaling system.

Paging Systems. A system intended to page one or more persons such as by means of voice over loud- speaker stations located throughout the premises or by means of coded audible signals or visual signals similarly distributed, or by means of lamp annunciators located throughout the premises.

Musical Program System. A system transmitting musical programs over loudspeakers for entertainment .purposes, the programs originating either on the premises or at a remote point and transmitted to the premises.

Process Monitoring Service System. A system used to supervise the normal functioning of a commercial process, where an abnormal condition does not constitute a fire or explosion emergency.

Gas-Operated (Local Fire Alarm) System. A local fire alarm system employing a compressed or liquefied gas as the energy to be released to sound audible signals when an alarm is transmitted.

Annunciator. A unit containing two or more identified targets or indicator lamps in which each target or lamp indicates the circuit, condition or location to be annunciated.


G~N~L 72A-7

CHAPTER 2. COMMON REQUIREMENTS

ARTICLE 200. GENERAL

2010. Scope.

2011. The provisions of this standard contemplate supervised systems providing fire alarm or supervisory signals within the protected premises. These systems are primarily for the protection of life by indicating the necessity for evacuation of the building and secondarily for the protection of property.

2012. The intent and meaning of the terms used in this standard are, unless otherwise defined herein, the same as those of the National Electrical Code.

2013. The energy sources for operation of the system may be an electric power source connected to the devices through electrical circuits, or may consist of suitable tanks of compressed or liquefied gas connected through tubing or piping.

2014. The systems may provide for :

a. Manual Fire Alarm Service;

b. Automatic Fire Alarm Service;

c. Automatic detection of alarm or abnormal conditions in extinguishing systems, such as sprinkler and carbon dioxide;

d. Watchman's Supervisory Service;

e. Automatic detection of abnormal conditions in industrial processes which could result in fire or explosion endangering life or property;

f. Use of all or part of electrical-type systems for additional purposes, such as (1) sounding of paging signals throughout the premises, (2) distribution of music throughout the premises;

g. Addition of such items as in Item f as are applicable to gas-operated systems.

NOTE: Systems under Items f and g shall be known as Com- bination Systems. "'


72A-8 LOCAL PROTECTIVE SIGNAIANG STff r l IM~

2015. It is recommended that at least one audible fire alarm signal be located outside the building to alert persons in the vicinity who in turn could summon fire-fighting assist- ance.

2016. Depending upon the application, local fire alarm systems may include one or more of the following features:

a. Locating the point of origin of the alarm by coded alarm signals or annunciation.

b. Presignal alarm (See Par. 2033) to minimize the possibility of panic in buildings of public occupancy or assembly.

2020. Approval.

2021. Information. At the request of the authority having jurisdiction, complete information regarding the system, including specifications, wiring or tubing diagrams, and floor plans shall be submitted for approval prior to installation of equipment or wiring.

2022. Equipment. All devices, combinations of devices, and equipment constructed and installed in conformity with this standard shall be approved for the purposes for which they are intended.

2023. Acceptance Tests. Upon completion of a system, a satisfactory test of the entire installation shall be made in the presence of a representative of the authority having jurisdiction.

2024. Maintenance Agreement. A satisfactory agreement on the maintenance of the system shall be provided. All systems shall be under the supervision of qualified persons. These persons shall cause proper tests and inspections to be made at prescribed intervals and shall have general charge of all alterations and additions to the systems under their supervision.

2030. Installation and Design. (All Systems) 2031. Systems. All systems shall be installed in a work-

manlike manner and in accordance with specifications and standards approved by the authority having jurisdiction.

2032. Jarring. Devices shall be so located and mounted that accidental operation will not be caused by vibration or jarring.


GZNZRAL 72A-9

2033. Pre-Signal Feature. Signaling systems in hotels, department stores, hospitals, and similar institutions having sounding devices within the protected premises may be so designed that initial fire signals will sound only in department offices, engine rooms, fire brigade stations, and other central locations, with provisions whereby authorized persons may subsequentl~ sound a genera l alarm.

2034. Local control functions, necessary to make the premises safer in the event of fire, or to make it possible to hear fire alarm signals, may be automatically performed. The performance of automatic control functions shall not interfere with power for l ighting or for operating elevators. This does not preclude the combination of fire protective signaling services with other services requiring monitoring of operations.

2035. Ceded Signals. A coded alarm signal shall consist of not less than three complete rounds of the number transmitted. A coded supervisory signal may consist of one round of the number transmitted.

2036. Restoration. All apparatus shall be restored to normal as promptly as possible af ter each test or alarm, and kept in normal condition for operation. This shall include rewinding, resetting, or replacement, as necessary.

2040. Installation and Design (Special Features Applying to Electrical Systems Only).

2041. Grounding. All systems shall test free of grounds, except parts of circuits or equipment which are intentionally and permanently grounded to provide ground fault detection, emergency ground signaling, or circuit protective grounding. All systems shall be so designed that they do not depend upon the effectiveness of any ground connection for normal operation.

2042. Voltage Variation. A system shall be so designed and installed that it shall be capable of performing its intended function at 85 per cent and at 110 per cent of the rated voltage, except that systems using manganese-zinc- alkaline pr imary batteries (See Paragraph 2261d) as a main source of operating power shall operate successfully down to 67 per cent of rated voltage.

2050. Installation and Design (Special l~eature ApplYing to Gas-Operated Systems).


7 2 A - 1 0 L o c ~ eR~rscrr~ mGN~.n~G S Y S ~ S

2051. General Tubing and fittings for interconnecting components of gas-operated systems shall be of a material suitable for the application. Recognition by a nationally recognized testing laboratory may constitute suitability.

2052. R e s t r i c t i o n o f L e n g t h . The total length of tubing in any system shall not be greater than that specified by a nationally recognized testing laboratory.

2053. Installation. Tubing may be installed exposed on ceilings and on sidewalls if not less than seven feet from the floor, and if adequately protected against injury. Exposed tubing shall be supported by suitable fasteners, straps or hangers at intervals not exceeding 4½ feet and within 12 inches from every device, cabinet or fitting. Fasteners used for this purpose shall be designed and installed to prevent mechanical damage to the tubing. Concealed tubing, or tubing passing through floors or walls, or located on side walls within seven feet of the floor, shall be protected by installation in pipe, conduit, raceway, or other means acceptable to the authority having jurisdiction.

2054. Clearance of Lines. As each section of tubing is installed, it shall be blown clear with compressed air or other compressed gas before connections to system components, so as to eliminate any accumulation of dirt or moisture within the tubing.

2055. Where tubing and fittings are exposed to a corrosive atmosphere, they shall be protected by a suitable coat- ing.

ARTICLE 210. WIRING (Electrical Systems or Electrical Portion of Gas-Operated

Systems)

2110. General.

2111. The provisions of this Article apply to installation wiring for interconnecting system components.

2112. Fire-protective signaling circuits, at multiple circuit terminal and junction locations where circuits for other purposes are present, shall be marked for identification or


WIRIN~ 72A-11

so protected as to avoid interruption of service due to short circuiting or other conditions of testing and servicing which might affect adversely the connected fire-protective signaling equipment.

2120. Exposure.

2121. Insulation. The insulation materials of conductors and cables shall be suitable for the normal conditions to which they are exposed in service.

2122. Wiring, cables and terminal junction facilities, unless adequately protected, shall be located where they are not exposed to hazardous or corrosive atmospheres, stored combustible materials, or to other potential hazards which might cause disruption of service.

Outside Wiring

2130. Circuits.

2131. Wiring circuits reserved solely for fire-protective signaling services and complying with the requirements of the National Electrical Code (Article 800) for communica- tion circuits are acceptable for outside wiring.

2132. To secure the greatest measure of protection and dependability in the operation of protective signaling systems it is recommended that all wires outside buildings be placed underground.

Inside Wiring

2140. General.

2141. All inside wiring shall be in conformity with the requirements of the National Electrical Code (Article 725) for Class 1 Signal Systems except as otherwise permitted in this Article, or other Articles, of this Standard. Flexible cords of the types described in Article 400 of the National Electrical Code shall not be used.

2150. Special Cables.

2151. Special cable approved for the purpose may be


72.%-12 L o c a l . PROTECTIVE SIGNALING SYSTEMS

used as detailed in Paragraphs 2152, 2153, 2154, 2155, 2156.

2152. Low Voltage Applications. Cable for operation at 150 volts or less, shall be constructed as follows:

a. Conductors shall be of solid copper, no t less than No. 14 AWG for single- and two-conductor cables, not less than No. 18 AWG for three- and four-conductor cables, and not less than No. 22 AWG for cables having more than four conductors.

b. The individual conductors shall have approved insulation having a nominal thickness of not less than 1/32 inch.

c. The cable conductors shall have a solid metallic sheath or a moisture-resistant and flame-retardant jacket providing equivalent protection against mechanical injury to that obtained with nonmetallic sheathed cable described in the National Electrical Code.

2153. The special cables may be installed exposed on a ceiling and on a side wall if not less than 7 feet from the floor and if adequately protected against injury. Concealed cable and cable passed through a floor or located on a side wall within 7 feet of the floor shall be installed in conduit or other approved raceway, unless solid metallic sheath is provided. Cable shall be adequately supported and terminated in approved fittings.

2154. Limited Energy Applications. Approved cable meeting the requirements of Paragraphs

2155 and 2156 may be used in circuits having energy limit- ing characteristics as follows:

a. Circuit voltages not to exceed those shown in Column 1 of Table 1.

b. Maximum fault currents designed into the circuit not to exceed those shown in Column 2 of Table 1.

c. Noninterchangeable overcurrent protection not to exceed that shown in Column 3 of Table 1.

d. Energy limitations not to exceed those shown in Column 4 of Table 1.


WIRING 7 2 A - 1 3

T a b l e 1

I 2 3 4 M a x i m u m fau l t N o n i n t e r c h a n g e a b l e

cur r e n t overcurrent E n e r g y L i m i t a t i o n V o l t a g e R a n g e AC or DC pro tec t ion AC DC

200~250 0.1 a - - - - - -

151-199 0.15 a - - - - - -

61-150 1.00 a 1 .00 a - - - -

31-60 - - 1.6 a 100 v a ( S e e N o t e )

0-30 - - 3.2 a 100 v a ( S e e N o t e )

NOTE: W h e r e b a t t e r i e s a r e u s e d a r e s i s t o r s h a l l b e in t h e c i r c u i t t o l i m i t t h e f a u l t c u r r e n t t o t h a t o b t a i n e d f r o m a 100 v a ap- p r o v e d t r a n s f o r m e r of t h e s a m e v o l t a g e o u t p u t . R e c t i f i e r s a n d g e n e r a t o r s s h a l l h a v e b u i l t - i n e n e r g y l i m i t i n g c h a r a c t e r i s t i c s e q u i v a l e n t t o t h o s e o f a 100 v a a p p r o v e d s i g n a l i n g t r a n s f o r m e r .

2155. Conductors of cable for use with limited energy circuits shall be:

a. solid copper, bunched-tinned (bonded) s t randed copper, or copper alloys of equivalent tensile s t rength

b. but no smaller than 1. 16 gauge single conductor copper 2. 19 gauge multi-conductor copper

c. Covered by approved insulation having a 0.012 inch nominal 0.010 inch minimum thickness for both the outside jacket and the conductors. A single conductor cable shall have a jacket not less than 0.035 inch nominal 0.030 inch minimum thickness. Two or more conductors may be in flat parallel construction with 0.023 inch nominal integral insulation jacket, minimum 0.020 inch and with 0.031 inch minimum web.

d. The insulating compound shall have a tempera ture ra t ing not less than 105°C and the jacket compound shall have a high degree of abrasion resistance.

2156. Limited energy cable described in Paragraphs 2154 and 2155 may be installed as follows:

a. Exposed on surface of ceiling and sidewalls or "fished" in concealed spaces. Cable shall be adequately supported and terminated in approved fittings and installed in such a way that maximum protection against mechanical in jury is afforded by building construction such as base- boards, door frames, ledges, etc. When located within 7 feet



of the floor, cable shall be securely fastened in an approved manner, such as iffSulated stapling at intervals of not more than 18 inches.

b. As protection against mechanical injury, cable shall be installed in metal raceway when passing through a floor or wall to a height of 7 feet above the floor unless adequate protection can be afforded by building construction such as detailed in Paragraph 2156, or unless solid metallic sheath is provided.

2160. Line Thermostats.

2161. Line type thermostats, including insulated copper tubing of pneumatically operated detectors employed for both detection and current-carrying purposes, shall be installed in conformity with Paragraph 2153 and shall provide adequate insulation for the voltage applied to the thermostat. (See Paragraph 2155.)

ARTICLE 220. POWER SUPPLY SOURCES

2210. General.

2211. The provisions of this Article apply to sources of power supply which shall be used, for the type of system involved, subject to acceptance by the authori ty having jurisdiction.

2212. Equipment. The equipment shall be approved for the particular application.

2213. Installation. (Electrical Systems) All power supply equipment (batteries, battery chargers, rectifiers, switching facilities, t ransformers, etc.) and wir ing shall be installed in conformity with the requirements of the National Electrical Code for such equipment except as otherwise indicated in this Article.

2214. Emergency Power Supply. Only one main power supply source is required for system operation; however, when there is provided in the protected premises an emergency power supply separate f rom the main building supply and available for operation of essential services, this emergency supply should be used as a secondary power supply for the alarm system.


POWER SUPPLY SOURCES 7 2 A - 1 5

2220. Light and Power Services (Electrical Systems or Electrical Part of Gas-Operated Systems).

2221. General. A reliable electric light or power service may be used as a source of supply for fire-protective signaling systems under the following conditions:

a. Two-Wire Supplies: A two-wire supply circuit may be used for either the main operating power supply or the trouble signal power supply of the signaling system.

b. Three-Wire Supplies: A three-wire a-c or d-c supply circuit having a continuous unfused neutral conductor, or a polyphase a-c supply circuit having a continuous unfused neutral conductor where interruption of one phase does not prevent operation by the other phase, may be used with one side or phase for the main operating power supply and the other side or phase for the trouble signal power supply of the signaling system.

2222. Point of Connection. The conductors of the signaling system power supply circuit shall be connected on the line side of the main service of a commercial light or power supply circuit or to the main bus bars of an isolated power plant located on the premises. A circuit disconnecting means shall be so installed that it will be accessible only by authorized personnel.

2223. An overcurrent protective device of suitable current-carrying capacity and capable of interrupting the maximum short-circuit current to which it may be subjected shall be provided in each ungrounded conductor. The overcurrent protective device shall be enclosed in a locked or sealed cabinet located immediately adjacent to the point of connection to the light and power conductors.

2230. Engine-driven Generator Sets (Electrical Systems)

2231. An engine-driven generator set shall be used only where a specifically trained operator is on duty at all times.

2232. The installation of such units should conform to the provisions of NFPA No. 37, Standard for Stationary Combustion Engines and Gas Turbines, except as restricted by the provisions of this Section.

2233. Fuel shall be stored in outside underground tanks whenever possible and gravity feed shall,not be used. Suffi-


7 2 A - 1 6 LOCAL PROTECTIVE SIGNALING SYSTEMS

cient fuel shall be available for 12 hours of operation at full load if a reliable'source of supply is available at any time on two hours' notice; if a source of supply is not reliable or readily available or if special arrangements must be made for refueling as necessary, a supply sufficient for 24 hours of operation at full load must be maintained.

2234. The unit shall be of sufficient capacity so as to be able to operate the system under the maximum normal load conditions in addition to all other demands, such as emergency lighting, etc., which may be placed upon the unit.

2235. A storage battery should preferably be installed floating on the system and arranged to provide current for operating the system until the generator unit reaches operating speed as well as providing starting current for the internal combustion engine. The battery should have sufficient capacity for operation of the system for at least one hour.

2236. The generator should be operated weekly under load by disconnecting the normal supply to the system for a minimum of three hours in a continuous period. This should be carried out at a definitely scheduled time every week.

2240. Storage Batteries (Electrical Systems).

2241. Location. Storage batteries shall be so located or enclosed that the equipment of the signaling system, including overcurrent protective devices, will not be affected adversely by battery gases.

2242. Charging Source. A reliable source of power supply of not more than 250 volts shall be provided for charging the batteries. Where the record of continuity of the supply source makes it desirable, two separate, independent sources of supply shall be provided.

2243. Overcurrent Protection. The battery shall be protected by overcurrent devices having a rating of not less than 150 per cent and not more than 200 per cent of the maximum operating load applied to the battery.

2244. Charging Method. The method of charging a battery shall provide either integral meters or readily accessible terminal facilities for the connection of portable meters


POWER SUPPLY SOURCES 72A-17

by which the battery voltage and charging current can be determined.

2245. Float-Charged Batteries.

a. Venting. Provision shall be made to prevent spray- ing of the electrolyte of the battery while the battery is being charged at the maximum rate permitted by its charging means.

b. Capacity. The battery shall be capable of operating the system for not less than 24 hours with the maximum normal load and with the power supply to the charger disconnected.

c. Charging. Adequate facilities shall be provided to maintain the battery fully charged under all conditions of normal operation, and with sufficient rectifier capacity to operate the system under alarm conditions, with the battery disconnected. The same regulation shall be provided as required in Paragraph 2251.

d. Rectifiers. A rectifier shall be energized by an insulating transformer having a supply circuit of not more than 250 volts.

2250. Rectifiers, Direct-Connected (Electrical Systems).

2251. General. A rectifier employed as a direct source of supply for a signaling system shall be approved for the purpose and of adequate capacity to maintain voltage regulation between 130 per cent of rated voltage at no load and 100 per cent of rated voltage at maximum rated load.

2260. Primary Batteries (Electrical Systems and Elec- trical Par t of Gas-0perated Systems).

2261. Use. Except as specified under sub-paragraph (d) below, a primary battery (including dry cells) shall not be used as the main operating supply of a signaling system. It may be used:

a. As a source of supply for operating trouble signal devices.

b. As an emergency auxiliary source of supply for operating a signaling system temporarily' in the event of



interruption of the main operating supply. Batteries described in Paragraph 2261 d may not be used unless the system is designed to preclude any flow of current through them in the charging direction from the power source.

NOTE: The use of a common battery for both conditions (a) and (b) above is acceptable.

c. As a source of bias potential where depreciation of the bat tery results in a trouble signal when the circuit becomes inoperative.

d. Pr imary batteries manufactured by the manganese- zinc-alkaline process, i.e., having a manganese dioxide cath- ode, a porous zinc anode, and potassium hydroxide electrolyte, or the equivalent as regards operating performance, may be used as the main operating supply of a signaling system providing:

1. Battery shall be capable of operating the system under normal load conditions for a period of at least one year and at the end of this period capable of sounding at least one alarm signal of not less than five minutes' duration, or at least a complete coded signal.

2. Battery shall be capable of operating the system under alarm conditions at ambient temperatures down to 0 degrees F.

3. The system control unit is specifically designed for use with manganese-zinc-alkaline primary batteries and is so identified on the control unit.

2262. Location. Primary batteries shall be located not less than six inches nor more than six feet above the floor in a clean dry place where the ambient air temperature will not be less than 40 degrees F. and not more than 100 degrees F., except that control units or battery enclosures containing manganese-zinc-alkaline primary cells may be mounted in locations where the minimum temperature is not lower than 0 degrees F.

2263. Enclosure. A primary bat tery shall be housed in a locked substantial enclosure or otherwise suitably protected against movement, injury, and moisture. A reliable separation between cells shall be provided to prevent con-


POWER SUPPLY SOURCES 7 2 A - 1 9

tact between terminals of adjacent batteries and between battery terminals and other metal parts which may result in depletion of the battery or other deterioration.

2264. Insulating Containers. Battery cells having containers constructed of other than suitable electrical insulating material shall be located on insulating supports.

2265. Connectors. Pr imary batteries shall be intercon- nected by suitable connectors.

2266. Inspection and Test. Each primary battery shall be inspected and tested to determine its terminal voltage while supplying the maximum load permitted by its application at least once each month. The battery shall be replaced when its voltage under load conditions (such as obtained in coded systems) causes the system to perform erratically and, in any case, when its voltage falls to 1.00 volts per cell under maximum continuous load.

2267. Maximum Load. The maximum normal load of a primary battery shall not be more than two amperes per cell.

2268. Capacity. A primary battery shall have sufficient capacity to supply 125 per cent of the maximum normal load of the system for not less than one year.

2269. Pr imary cells shall be replaced under the following conditions:

a. An individual primary cell rated 11/2 volts shall be replaced when its short-circuit current is less than ten amperes or when a load of one ohm reduces the potential below one volt.

b. A unit assembly of pr imary cells rated six volts shall be replaced when a load of four ohms reduces the potential of the unit below four volts.

2270. Special Features Applying to Gas-Operated System Power Supplies.

2271. When each automatic fire detector in a system has its own compressed gas supply tank to provide power for operation of an audible alarm signal or signals, each tank shall have sufficient capacity to produce at least a five- minute alarm signal. Where a single supply tank is used to power the audible alarm signals, it shall have sufficient



capacity to operate all audible signals connected thereto for at least five minutes. There shall be a visual indication showing a distinctive color so long as there is sufficient gas in any alarm signal power supply tank to operate the audible signals for the required five minutes. This color shall change to clear when the gas is depleted sufficiently to produce less than a five-minute signal. In lieu of the visual indication an audible trouble signal may be provided to indicate a supply insufficient to produce at least a five-minute signal.

2272. Type of Gas. The compressed gas shall be non- flammable and not harmful to life under intended conditions of use and limited in quantity so that the discharge of all the gas in the system shall not create any hazard to life through displacement of oxygen.

2273. Construction of Containers. Containers for compressed gas shall conform to all applicable regulations of the Interstate Commerce Commission.

2274. Full Discharge. A container of compressed gas utilized as a system power supply shall be connected into the system without a manual cut-off, so that when it is activated all the gas in the container will be expended.

2275. The filled weight and instructions for determining allowable weight loss shall be indicated on each compressed gas container. Each compressed gas power supply container shall be weighed after filling and the weight noted on the container. Gas containers shall be stored on the premises of the manufacturer or installing company for not less than 30 days and weighed again just prior to installation. Any filled containers showing weight loss shall not be used.


OVERCURRENT PROTECTION 72A-21

ARTICLE 230. 0VERCURRENT PROTECTION (Electrical Systems)

2310. General.

2311. See Paragraphs 2223 and 2243.

2320. Conductors.

2321. Conductors shall be protected in accordance with their rated current carrying capacities as given in the Na- tional Electrical Code.

2330. System Control Units.

2331. A system control unit shall be protected on the supply side by overcurrent devices having a rating not greater than 150 per cent of the rating of the control unit.

2340. Transformers.

2341. A transformer shall be protected on either the primary or secondary side by overcurrent devices having a rating not greater than the continuous duty rating of the t ransformer unless the current is limited to the same value by other approved means.

ARTICLE 240. ELECTRICAL SUPERVISION (Electrical Systems)

2410. General.

2411. Except as otherwise indicated in this Standard, all fire alarm and process monitoring alarm systems shall be electrically supervised so that the occurrence of a break or a ground fault condition of its installation-wiring circuits which prevents the required operation of the system, or failure of its main power supply source, will be indicated by a distinctive trouble signal. (See Section 2440.)

NOTE: (a) The provision of a double loop or other multiple- path conductor circuit to avoid electrical supervision is not acceptable except as indicated in Paragraph 2424 (a).

(b) Electrical supervision of conductors for a short-circuit fault is not contemplated by this requirement. A multiple-ground condition is considered the equivalent of a short-circuit fault.



2420. Electrical Supervision. The electrical supervision shall include:

2421. Power Supply Circuits Supervision. All sources of energy except the following secondary sources:

a. One employed for the operation of trouble signal circuits and appliances.

b. One employed as an auxiliary means for maintaining the normal operation of the system following trouble signal indication when the main supply source is inter- rupted.

c. One employed as a means for operating a supplementary circuit for alarm bells, annunciators, time stamps and similar circuits, the failure of which will not prevent the operation of the system for the required signals.

d. The battery leads of a float-charged battery.

e. The neutral of a three-, four-, or five-wire a-c or d-c supply source.

2422. Signal Initiating Circuits. All circuits for signals initiated by the operation of fire alarm boxes, fire detectors, automatically operated transmitters, or other appliances or devices which initiate or transmit signals either manually or automatically, except:

a. A non-interfering shunt circuit, provided that a fault condition of the shunt circuit wiring results only in the loss of the non-interfering feature of operation.

b. The circuits of a supplementary signal annunciator, provided that the fault condition of this circuit wiring results only in the loss of annunciation.

c. The circuits of thermostats or detectors of a metallic tubing automatic fire alarm system where the wiring terminals of such devices are connected in multiple across electrically supervised circuits.

2423. Supplementary Control Circuit. A supplementary circuit for operating fan motor stops or similar industrial control equipment intended to be actuated at the time of an alarm signal, need not be electrically supervised, provided a fault condition of the circuit in no way affects the normal operation of the signaling system.


L~bEC?rRICAL SUPERVISION 72A-23

2424. Alarm Signal Sounding Circuit~ All circuits fo r operat ing a larm sounding devices and appliances except:

a. Alarm signal sounding appliances when (1) alter- nately connected to two or more circuits and approximately equally dis tr ibuted throughout the building, or (2) connected to a re turn loop circuit so tha t a break or ground faul t does not prevent the operat ion of any sounding appliance and wi th means provided for tes t ing the continuity of the circuit.

NOT~.: Approximately equally distributed throughout shall be interpreted to mean sounding appliances shall be installed so that failure of any one circuit of alarm signals shall not prevent the alarm from being heard in the area served by that circuit.

b. The circuit of an a larm sounding device installed in the same room with a system control unit, provided the circuit conductors are installed in conduit or equivalently protected against mechanical in jury and tampering.

c. A trouble signal circuit.

2430. Supervision of Gas-Operated System.

2431. The tubing between detectors shall be supervised so tha t a leak will be manifes ted by an audible t rouble signal distinctive f rom alarm signals and operated by a separate power supply. The t rouble signal power supply may be electrical and taken f rom the public uti l i ty light and power circuit or f rom a bat tery. I f taken f rom the public util i ty light and power circuit, it shall be a separa te fused circuit not used for any other purpose.

2432. When only one compressed gas tank is used in a system to sound an alarm, this tank shall be supervised so that an audib le t rouble signal will be sounded if the tank loses enough gas to reduce the period of audible alarm signal to less than 5 minutes.

2433. Where each automatic detector has a compressed gas supply tank used to power all audible alarm signals, or where each audible alarm signal has its own compressed gas supply tank, and there are at least two or more audible alarm signals installed on the premises, so tha t the loss of one will not prevent the alarm f rom being clearly heard over the entire premises, an audible t rouble s igna l is not required. ~,



2440. Trouble Signals (All Systems) 2441. DistinctiVe Trouble Signals. Trouble signals shall

be distinctive f rom alarm signals and shall be indicated by the continuous operation of a sounding appliance. An audible t rouble signal may be common to several supervised circuits.

2442. Silencing Switch. A switch or valve fo r silencing the trouble signal sounding appliance may be provided only if it t r ans fe r s the trouble indication to a lamp or other acceptable visible indicator adjacent to the switch. The visible indicator shall remain operated until the silencing switch is restored to its normal position unless the audible trouble signal will be obtained when a faul t occurs wi thout restor- ing the switch to normal or unless the audible t rouble signal is again energized upon correction of the fault.

2443. Location of Trouble Signal. Trouble sounding appliances shall be located as required by the author i ty having jurisdiction.

AR TICLE 250. A U D I B L E S I G N A L I N G A P P L I A N C E S

2510. Evacuation Systems.

2511. Fi re a larm systems provided for evacuation of oc- cupants of factories, workshops, institutions, and similar premises shall have one or more audible signaling appliances approved for the purpose on each floor of the building, so located tha t their operation will be heard clearly regardless of the maximum noise level obtained for ma- chinery or other equipment under normal conditions of occupancy. Each section of a floor divided by a fire wall may be considered as a separate floor for the purpose of this protection.

2520. Distinctive Signals. 2521. Audible signal appliances of a fire a larm sys tem

shall produce signals which are distinctive f rom other similar appliances used for other purposes in the same area. Different types of fire-protective audible signaling appliances in the same area are not recommended.


SIGNAL CAPACITY OF CIRCUITS 7 2 A - 2 5

ARTICLE 260. SIGNAL CAPACITY OF CIRCUITS

2610. General.

2611. The number of signal transmitting devices connected to any signaling circuit shall be limited to avoid in- terference. The total number of code wheels connected to a single circuit shall not exceed 250.

2612. The number of waterflow switches which may be connected to actuate a single transmitter shall not exceed five, and the number of supervisory switches which may be connected to actuate a single transmitter shall not exceed twenty.

2620. Separate Alarm Signal Circuits.

2621. It is recommended that alarm signal transmitting devices be connected to signaling circuits reserved solely for alarm signals.

2630. Combined Alarm and Supervisory Signal Circuits.

2631. When both sprinkler supervisory signals and fire or waterflow alarm signals are transmitted over the same signaling circuit, provision shall be made to either obtain alarm signal precedence or sufficient repetition of the alarm signal to prevent the loss of any alarm signal transmitting devices.

2640. Loading Capacity of Watch Supervisory Signal Cir- cuits.

2641. Connections to watch supervisory signal circuit, or to a combination manual fire alarm and watch signal circuit, shall be so limited that not more than 60 scheduled watch report signals will be transmitted in any one hour period. Patrol scheduling shall be such as to avoid inter- ference between watch report signals.



ARTICLE 270. COMBINATION SYSTEMS

2710. Scope.

2711. The provisions of this Article apply to the types of equipment used in common for fire protective signaling systems, such as for fire alarm, sprinkler supervisory or watch service, and for other signaling systems, such as voice paging or music program systems, or coded paging systems, and to methods of using circuit wiring common to both types of system.

2720. Wiring Common to Both Types of System.

2721. When common wiring is employed for combination systems, the equipment for other than fire protective signaling system use shall be connected to the common wiring of the system in such a manner that short circuits, or open circuits, or grounds in this equipment or between this equipment and the fire protective signaling system wiring will not interfere with either the supervision of the fire system or prevent alarm or supervisory signal transmission.

2730. Use of Loud-speakers.

2731. Use of loud-speakers to provide the audible signal for local fire alarm or sprinkler alarm systems, as well as the use of these same speakers for voice paging or music programs in combination systems shall be subject to the following conditions :

a. Only high-grade re-entrant horns shall be used as speakers.

b. Fire alarm signals shall be distinctive in tone and this tone used for no other purpose.

c. Supervisory signals shall be distinctive in tone and this tone used for no other purpose.

d. Fire alarm and supervisory and trouble signals shall take precedence over all other signals.

2740. Speaker Amplifier.

2741. When speakers are used to produce audible signals for local fire alarm or supervisory systems, the audio amplifiers for powering the speaker circuits shall be in duplicate and so arranged that failure of one amplifier will not pre-


COMBINATION SYSTEMS 7 2 A - 2 7

vent the transmission of audible signals to all circuits and will be accompanied by an audible trouble signal.

2742. If no more than two speakers are required to meet the requirements of Paragraph 2511, duplicate amplifiers need not be provided.

2750. Sound Source for Speakers.

2751. Duplicate signal generating equipment shall be provided so that failure of one will not prevent the transmission of the distinctive sound and will also be accompanied by an audible trouble signal.

2752. If no more than two speakers are required to meet the requirements of Paragraph 2511, duplicate signal generating equipment need not be provided.

2753. Failure of any signal generating equipment shall result in an audible trouble signal.



CHAPTER 3. TYPES OF SIGNALING SERVICES

A R T I C L E 300. SCOPE

3010. The provisions of this Chapter apply to signaling services which may be provided individually or in combination by different types of systems except as otherwise indicated for each type of system.

ARTICLE 310. MANUAL FIRE ALARM SERVICE

3110. Fire Alarm Boxes (All Systems).

3111. General. Manual fire alarm boxes shall be approved for the particular application and shall be used only for fire protective signaling purposes. Combined fire alarm and watchman's signaling boxes are acceptable.

3112. Mounting. Each box shall be securely mounted. It is recommended that the bottom of the box be not less than 41./2 feet and not more than six feet above the floor level.

3113. Distribution. Manual fire alarm boxes shall be distributed throughout the protected area so that they are unobstructed, readily accessible, and located in the normal path of exit from the area.

a. Additional boxes shall be provided on each floor to obtain a maximum horizontal t ravel distance of 200 fee t to the neares t box.


WATCHMAN'S SUPERVISORY SERVICE 72A-29

3114. Coded Signal Designations. A coded fire alarm box shall produce not less than three signal impulses for each revolution of the coded signal wheel.

NOTE: The following suggested coded signal assignment for building having four floors and basements is provided as a guide:

Location Ooded 8ig~a~

Fourth Floor 2-4 Third Floor 2-3 Second Floor 2-2 First Floor 2-1 Basement 3-1 Sub-basement 3-2

ARTICLE 320. WATCHMAN'S TOUR SUPERVISORY SERVICE

3210. General

3211. The number of watehman's reporting stations, their locations;and the route to be followed by the watchman for operating the station shall be approved for the particular installation.

3220. Signal Recording.

3221. A permanent record indicating each time each signal transmitting station is operated shall be made at a supervising location.

3230. Suppressed Signal Type.

3231. When intermediate stations which do not transmit a signal are employed in conjunction with signal transmitting stations, distinctive signals shall be transmitted at the beginning and end of each tour of a watchman and a signal transmitting station shall be provided at intervals not exceeding ten stations.

3232. Intermediate stations which do not transmit a signal shall be capable of operation only in a fixed order of succession.

3233. Stations which transmit a signal only when not operated within a prescribed time interval may be used' as intermediate stations where a fixed route ~is not considered necessary to assure complete watch service.



ARTICLE 380. MISCELLANEOUS SYSTEMS

Watehmen's Time-Recording Apparatus

3310. Local or Private Stationary Systems.

3311. A spring motor-driven clock shall run at least eight days without rewinding.

3312. The signal recording means shall be so enclosed that the recordings cannot be seen without opening the enclosure, except that the authority having jurisdiction may permit visible recordings where someone who can check the tours of the watchmen is on duty.

3313. A distinctive recording shall be made to indicate the time of opening and closing of the enclosure.

3314. Systems involving sources of current supply other than magneto are deemed as falling within the requirements of Article 330 except as indicated in Paragraph 3315.

3315. When supplementary means are provided to insure that the watchman has visited his stations in a prede- termined order and when indication is automatically made of the number of stations visited:

a. Circuit wiring need not be electrically supervised. b. Signal time recording means may be operated by a

self-starting electrical clock if a permanent record indicating stoppage of the clock is provided.

3320. Portable Watch Clocks.

3321. The clock used shall run for at least 48 hours without rewinding, shall be made so that the watch recordings cannot be seen without opening the case and so that it cannot be opened without indicating, by a distinctive recording, the time of opening and closing.

3322. Records shall be legible and permanent.

3323. Stations shall be located as required by the authority having jurisdiction and fixed so that they cannot be removed without giving evidence of removal.

3324. Keys shall be made so that they are difficult to duplicate and shall be of a pattern susceptible of variations tending to reduce the probability that a set of keys fitted for one clock will operate other clocks.


AUTOMATIc DETECTION AND ALARM SERVICE 72A-31

ARTICLE 340. AUTOMATIC F I R E DETECTION AND ALARM SERVICE

3410. General.

3411. The provisions of this Article apply to systems employed for automatic fire alarm signals.

3420. Supplementary Manual Alarm Signal Operation (All Systems, Gas and Electric).

3421. Supplementary means for manually operating an automatic fire alarm system for an alarm signal should be located where designated by the authori ty having jurisdiction. (See Paragraph 3531)

3430. Detecting Equipment (All Systems) (Gas and Elec- t r ic) .

3431. Location. Fire-detecting equipment shall be located upon the ceiling or on the side walls near the ceiling. It shall be installed throughout all par ts of the protected premises, including all rooms, halls, storage areas, basements, attics, lofts, and other subdivisions and accessible spaces; and inside all closets, elevator shafts, enclosed stairways, dumb-waiter shafts, chutes, and other minor subdivisions and enclosures.

a. Where codes, standards, laws, or authorities having jurisdiction require the protection of selected areas only, the specified areas shall be protected in accordance with this Standard.

b. For the purposes of this Article, the area underneath a deck, mezzanine, or floor landings of stairways having a minor dimension of four (4) feet or more shall be considered a separate subdivision and shall be protected accord- ingly.

c. Protection may be required under large benches, shelves, or tables and inside cupboards or other enclosures not extending to the ceiling.

d. Protection may also be required underneath open loading docks or platforms and their covers, and for accessible under-floor spaces of buildings without basements.

3432. High Temperature Areas. ~pecial instructions shall be obtained f rom the authori ty having jurisdiction



regarding the use o£ high-temperature degree thermostats in boiler rooms, heating boxes, skylights, etc.

3433. Spacing. Detector spacings shall not exceed the linear maximums indicated by tests of Underwriters' Labo- ratories, Inc., Underwriters' Laboratories of Canada, and Factory Mutual Engineering Division for the particular device used. Closer spacing may be required due to struc- tural characteristics of the protected area, possible drafts, or other conditions affecting detector operation. Detectors operating primarily on the heat convection principle and installed on a joisted ceiling should have their smooth ceiling spacing reduced where this spacing is measured at right angles to solid joists; in the case of spot detectors, i.e., thermostats, this spacing should not exceed 50 per cent of the listed spacing.

3434. Support. Thermostats shall be supportecl in all cases independently of their attachment to the wires or tubing.

3435. Tests. Fire detectors shall be tested periodically as specified by the authority having jurisdiction. 3440. Special Features on Gas-Operated Systems.

3441. For test purposes, each compressed gas-operated system shall have a manually-operated cylinder of gas installed in the tubing circuit at the point most remote from the alarm sounding device. If branch tubing circuits are installed, a test cylinder shall be installed at the end of each branch of tubing so the entire tubing circuit will be tested. A manual test cylinder may be provided with a shut-off valve and used repeatedly for tests until the supply of gas is exhausted. A check valve shall be installed so that a manual test cylinder can be removed for replacement without interfering with the operation of the system in case of fire. In systems using low pressure for pressurizing the tubing for supervision purposes, means shall be provided to bleed off the high pressure resulting from the use of the above test cylinder. Means shall also be provided to re- pressurize at low pressure to restore supervision of this tubing.

3442. A manual test cylinder shall be distinct and separate from a manually-operated cylinder installed for supplementary alarm signal purposes in accordance with Para- graph 3421. A supplementary manual alarm cylinder shall comply with all of the requirements of Section 2270.


SPe~NK~R SYSTEM WA~R~LOW A L ~ 72A-33

A R T I C L E 350, S P R I N K L E R SYSTEM W A T E R F L O W ALARM SERVICE

3510. Scope.

3511. The provisions of this Article apply to sprinkler system signaling a t tachments and circuits for indicating the flow of wa te r in the sprinkler system.

3512. The provisions of this Article do not apply to hydraulically operated alarm devices not having an electrical connection, such as wa te r motor gongs.

3513. When used to actuate an evacuation system or an alarm system aler t ing fire brigades, the system shall conform to all requirements of this Standard.

3514. When limited to not more than one sounding device inside and one outside the sprinklered property, both installed on one circuit, and each such circuit connected to not more than three sprinkler waterf low switches in the same fire area, and installed for the purpose of alert ing plant maintenance personnel and watchmen to the operation of the sprinkler system, the local sprinkler waterf low bell circuit need not comply with the provisions of Article 240.

3515. When limited to not more than one sounding device inside and one outside the sprinklered property, both installed on one circuit, and each such circuit connected to an annuncia tor actuated by waterf low in sprinkler systems, without limitation on number of waterf low switches, and used to alert plant maintenance personnel and watchmen to the operat ion of the sprinkler system, the local sprinkler waterf low signal system and the waterf low circuit or circuits to the annunciator need not comply with the provisions of Article 240.

3520. General Requirements.

3521. Provision shall be made to indicate the flow of water in a sprinkler system, except movement of wa te r due to waste, surges, or variable pressure, by an alarm signal. The waterf low signaling a t tachment shall operate to indicate any leak or flow of wa te r occurr ing at a ra te of ten or more gallons per minute.

NOTE: The basic concept is that flow of water through a sprinkler system equal to or greater than that from a single


72A-34 LOCA,. p ~ c r n ~ SmNAL~a SYSTEMS

automatic sprinkle~ will be detected. The specified value is less than flow through an adequate system and provides a margin of safety for inadequate condition~

3522. A signal attachment and its circuits shall be so designed and installed that they cannot be readily t a m p e r e d with or removed without causing a signal to be produced.

3523. Outdoor electric alarm devices shall be of a type specifically approved for outdoor use and the outdoor wiring shall be in approved conduit, properly protected from t h e entrance of water.

3524. It is desirable and often essential to provide approved identification signs for outside alarm devices. The sign should be located near the device in a conspicuous position and shall be worded as follows: "Sprinkler Fire Alarm - - When alarm sounds call fire or police department."

3525. Waterflow devices controlling electric alarm circuits should be provided with means for testing the electrical supply, circuits, connections, and devices. For sprinkler waterflow alarm tests, an actual waterflow, through the use of a test connection, shall be the method employed for testing the reliability of the sprinkler alarm unit as a whole. For a wet pipe system, the test connection at the extremity of the system shall be used. Short circuiting switches for alarm test purposes should not be installed in the alarm circuit from alarm or dry-pipe valve.

3526. Operating features of the system shall be tested monthly.

3527. Where vents are necessary for satisfactory electric alarm switch operation, such vents should be properly piped to a drain, installed in accordance with the requirements of NFPA No. 13, Standard for Sprinkler Systems.

3530. Specia l R e q u i r e m e n t s for Local E v a c u a t i o n and Alarm Systems (Supervised Systems).

3531. It is recommended that premises having a sprinkler system equipped to provide a waterflow alarm have supplementary means for manually transmitting an alarm signal located in the normal path of exit from the area.

3532. A dry pipe sprinkler system equipped for waterflow alarm signals only should provide supplementary supervision of the system air pressure to avoid false alarm


SP~K~R SYSTSM SUP~WSOSY S~-RWCE 72A-35

signals due to neglect in maintaining air pressure. Connec- tion of the pressure supervisory signal attachment contacts to obtain trouble signal operation Of the transmitter used for waterflow alarm signals is acceptable for this purpose.

3540. Special Requirements for Local Sprinkler Waterflow Alerting Systems (Unsupervised Systems).

3541. The Standard for the Installation of Sprinkler Systems (NFPA No. 13) describes in detail the considera- tions affecting the installation of local sprinkler alarm systems.

ARTICLE 360. SPRINKLER SYSTEM SUPERVISORY SERVICE

3610. Gate Valve Supervision.

3611. A gate valve shall be supervised to obtain two separate and distinctive signals, one indicating the movement of the valve from its normal position and the other indicating restoration of the valve to its normal position. The off-normal signal shall be obtained either during the first two revolutions of the hand wheel or when the stem of the valve has moved one fifth the distance from its normal position.

a. Where the signaling attachments of two or more valves utilize a common circuit, a restoration signal shall be obtained only when all of the valves of the group are in their normal positions.

b. An attachment for supervising the position of a gate valve shall not interfere with the operation of the valve nor obstruct the view of its indicator nor prevent access to its stuffing box.

3620. Pressure Supervision.

3621. Pressure sources shall be supervised to obtain two separate and distinctive signals, one indicating that the required pressure has been decreased or increased and the other indicating restoration of the pressure to its normal value.

a. A pressure supervisory signal ~ttachment for a pressure tank shall indicate both high andlow pressure con-



ditions. A signaL, shall be obtained when the required pressure is increased or decreased ten pounds from the required pressure value.

b. A pressure supervisory signal attachment for a dry pipe sprinkler system shall indicate both high and low pressure conditions. A signal shall be obtained when the required pressure is increased or decreased in accordance with requirements of the authority having jurisdiction.

c. A steam pressure supervisory attachment shall indicate a low pressure condition. A signal shall be obtained when the normal pressure is reduced to a value which is not less than 110 per cent of the minimum operating pressure of the steam-operated equipment supplied.

d. An attachment for supervising the pressure of other sources than those specified above shall be capable of being applied and operated as required by the authority having jurisdiction.

3630. Water Level Supervision.

3631. Water storage containers shall be supervised to obtain two separate and distinctive signals, one indicating that the required water level has been lowered or increased and the other indicating restoration to the normal level.

a. A pressure tank supervisory attachment shall indicate both high and low level condition. A signal shall be obtained when the water level is lowered or raised three inches from the required level.

b. A supervisory attachment for other than pressure tanks shall indicate a low level condition. A signal shall be obtained when the water level is lowered 12 inches from the required level.

3640. Temperature Supervision.

3641. Water storage containers shall be supervised to obtain two separate and distinctive signals, one indicating that the temperature of the water has been lowered to 40 degrees F., and the other indicating restoration to the proper temperature.


AUTOMATIC SMOKE ALARM SERVICE 7 2 A - 3 7

3650. Pump Supervision.

3651. Automatic fire pumps, auxiliary booster and special service pumps shall be supervised as prescribed by the authority having jurisdiction. Where supervision is applied to the electric power supplying the pump, connection of the supervisory device shall be made on the line-side of the motor starter, so that open fuses or open circuit breakers in the supply line to the pump will be detected at once.

ARTICLE 370. AUTOMATIC SMOKE ALARM SERVICE

3710. General.

3711. The authority having jurisdiction shall be con- sulted in all cases before installation of equipment.

3720. Signal Indication.

3721. Abnormal smoke density shall result in transmission of a distinctive smoke alarm signal. The signal transmitted shall designate the building protected where required by the authority having jurisdiction. The floor, section or subdivision of the building at which the signal originated shall be indicated also, either by the signal or by approved visual means in or at the building when the condition of occupancy and application of smoke detection are such that this feature is essential for adequate protection. Systems shall sound an audible alarm and preferably indicate the building and floor from which the signal is transmitted.

3722. Smoke alarm service may include provision for connection of a supplementary circuit for actuation of equipment controlling blowers, fans, shutters, etc., at the time of a smoke alarm signal.

3730. Location of Detectors.

3731. Smoke detectors shall be so located and adjusted to operate reliably in case of smoke at any part of the area .protected. The location of detectors shotfld be based upon


72A-38 LOCAL PROerECTIVE SIGNALING SYSTEMS

an engineering survey of the application of this form of protection to the area under consideration. These features include air velocity, number of detectors to provide adequate coverage of cross-sectional areas of the space with respect to travel, diffusion or stratification of smoke; location of detectors with respect to exhaust, intake, or circulat- ing blowers; air conditioning facilities, temperature variations, and the like. Such conditions vary with different installations and should be dealt with on the basis of experi- ence in the service.

3732. Special consideration shall be given to the storage of contents of a protected space to provide unobstructed openings for the travel of smoke to the smoke detector.

3733. Where air-conditioning or ventilating equipment serves the space to be protected by a smoke detector, particular attention shall be given to the intake, exhaust and circulation of smoke under any condition of operation of the equipment to insure prompt detection.

3734. Photo-electric light beams shall be so located or enclosed or otherwise arranged that movement of objects within the space protected will cause no signal.

3735. Light-sensitive equipment shall be so located or shielded that light from any source other than that intended to be applied to the equipment will have no effect upon the detector. The opening of any enclosure during normal servicing shall cause no smoke alarm signal. A smoke detector shall be so installed as to minimize the possibility of operation due to accumulation of dust, moisture, deterioration of equipment, or any other condition of system operation not associated with fire or smoke.

3736. The conditions of occupancy of each space protected by a smoke detector shall be arranged to avoid operation of the detector due to the use of fumigants or any other type of fog- or mist-producing materials, sweeping and cleaning resulting in dust circulation, and the like.

3737. The smoke-detection combination shall be able to withstand 110 per cent of the rated voltage continuously


AUTOMATIC SMOKE ALARM SERVICE 7 2 A - 3 9

without injury during the normal supervisory condition and shall operate successfully during the normal signaling condition at the increased voltage and also at 85 per cent of normal voltage.

3738. All smoke-detecting equipment shall be secured reliably in place. The security of separate photo-electric light source and receiver units shall insure against the change of adjus tment due to vibration, change in alignment of supporting surfaces, or the like.

3739. Provision shall be made to afford adequate protection of the smoke detection equipment f rom mechanical injury.

3740. Maintenance Servicing.

3741. All equipment requiring servicing shall be readily accessible and shall provide practical means for cleaning pa~s which accumulate dust, replacement of i l luminating lamps, etc.

3742. Suitable and practical facilities shall be provided to permit periodic testing for sensitivity.

3743. The equipment shall be inspected monthly and maintained in proper operating condition.

3750. Circuit Arrangement.

3751. The motor of a blower provided as a par t of a smoke detector shall be electrically supervised to indicate stalling or burnout.

3752. The requirements of Article 240 for electrical supervision of circuits applies to all wiring employed to inter- connect separate units of a smoke-detecting system and its power supply circuit wiring at the installation. In addition, the smoke-detecting system shall provide electrical supervision of all filaments of photo-electric cell i l luminating lamps and the filaments and heaters of all electronic tubes, if their failure prevents normal operation for a smoke alarm signal.

3753. The failure of electrically supervised circuits and parts shall be indicated by a trouble signal which is distinctive from a smoke alarm signal.


National Fire Protection Association International

60 Batterymarch Street, Boston, Mass. 02110

The National Fire Protection Association was organized in 1896 to promote the science and improve the methods of fire protection. Anyone interested may become an Associate Member; the annual dues are $30.00. National and regional societies and associations are eligible to be Organiza- tion Members; annual dues are $225. Full membership information is available on request.

This is one of a large number of publications on fire safety issued by the Association. All NFPA codes, standards, and recommended practices are prepared by NFPA Technical Committees and adopted at an Annual Meeting of the Association. They are intended to prescribe reasonable measures for minimizing losses of life and property by fire.

This and other NFPA codes, standards, and recommended practices are published in the National Fire Codes, a ten-volume compilation of NFPA's official technical material. Following are the titles of the ten- volume set:

VoL 1

Vol. 2

Vol. 3 Vol. 4

Vol. 5 Vol. 6

Vol. 7

Vol. 8

Vol. 9 Vol. 10

Write

Flammable Liquids, Ovens, Boiler-Furnaces

Gases Combustible Solids, Dusts and Explosives Building Construction and Facilities

Electrical

Sprinklers, Fire Pumps and Water Tanks

Alarm and Special Extinguishing Systems

Portable and Manual Fire Control Equipment

Occupancy Standards and Process Hazards Transportation

the Association for full information.

Discount Prices on this Pamphlet

The following schedule of discount prices for multiple copies of this pamphlet have been established:

1 to 4 copies: Unit price 25 copies and over: 25~ 5 copies and over: 15% 50 copies and over: 30%

10 copies and over: 20~ 75 copies a~d over: 35% 100 and over: Special quote


TYPICAL POCKET EDITIONS OF NFPA STANDARDS List revised as of June, 1971. Ti t les are abbreviated. For complete l is t of publications wr i te NFPA.

2M Model Legislation '67 . . . . 50 3M Hosp. Emerg. Preparedness "70 1.00 4 Organization, Fire Services '71 2.7.5 4A Fire Dept. Organization ' 69 .75 6 Industr ial Loss Prevent. '67 .50 7 Controll ing Fire Emerg. '67 . .50 B Management Responsibility '67 ..50 9 Training Reports, Records "70 .50

10 Extinguishers, Instal. '70 . . 1.00 IOA Extinguishers, Main]. '70 . 1.00 l o t Model Enabling Act ' 69 . . .50 11 Foam Ext. Systems "70 . . . 2.00 11A High Expansion Foam Syst. '70 .75 12 Carbon Dioxide Systems '68 . 1.50 12A Halon 1301 Systems '71 . . 1.75 13 Sprinkler Systems "71 . . . 2.50 13A Spr ink le r Maintenance '71 . 1.00 13E Sprinklernd Prop., F.D.

Operations at '66 . . . . . 60 14 Standpipe, Hose Systems "71 . 1.00 15 Water Spray Fixed 5yst. ' 69 . 1 .25 16 Foam-Water Systems '68 . . 1.00 17 Dry Chem. Ext. SYstems ' 69 . .75 18 WeLting Agents '66 . . . . . 50 182M Vaporizing Liquid '65 . . .40 19 Fire Apparatus Specs. '71 . 1.75 19B Respiratory Prut. Equip. "71 1.00 191 Portable Pump. Units ' 59 . . .35 193 Ladders, Ground-Aerial "59 . .50 194 Hose Coupling Threads ' 68 . .75 196 Fire Hose '71 . . . . . 1.00 197 In i t i a l Fire Attack '66 . . .50 198 Fi re Hose, care of ' 69 . . 1 .00

20 Centrifugal Fire Pumps '71 . 2.50 21 Steam Fire Pump. MAIM.. '63 . .60 22 Water Tanks '71 . . . . . 2.50 24 Outside Protection '70 . . . 1.25 25 Rural Water Systems ' 69 . . .75 27 Private Fire Brigades '67 . . .50 292M Water Charges, Private '61 . .40 29.5 Forest Fire Control '65 . . .75

30 Flam. Liquids Code ' 69 . . . 1 .00 31 Oil Burning Equlpmeot '68 . 1.25 32 Drycleaning Plants '70 . . . . 75 321 Class. Flare. Liquids ' 69 . . .50 325A Flasilpoint Index of Trade

Name Liquids '68 . . . 2.50 325M Prop. Flam. Liquids ' 6 9 . 3 .00 326 Warning Labels '51 . . . . . 25 327 Cleaning Small Tanks '70 . .50 328 Manholes, Sewers, Flare.

Liquids and Gases in "70 . . .75 329 Leakage, Underground

Flam. Liquid Tanks ' 65 . . .SO 33 Spray Finishing ' 69 . . . . 1.25 34 Dip Tanks "71 . . . . . 1.25 35 Mfg. Organic Coatings '71 . . 1.25 36 Solvent Extraction ' 67 . . . . 60 37 Combustion Engines '70 . . . . 75 385 Tank Vehicles "71 . . . . 1.25 386 Portable Shipping Tanks "70 . .50 393 Gasoline Blow Torches ' 69 . .SO

40 Motion Picture Fi lm ' 67 . . .60 41L Model Rocketry Code '68 . . .50 42 Pyroxylin Plastic Factories ' 67 .60 43 Pyroxylin Warehouses ' 67 . . .40 46 Timber, Outdoor Storage '61 . .50 46A Wood Chips, Storage '6S . . .40 468 O~Ldoar Storage of Logs "71 . 1.00 47 Lumber Storage Yards '61 . . .50 48 Magnesium "67 . . . . . . 60 481 Ti tanium '61 . . . . . . 60 482M Zirconium '61 . . . . . . 50 49 Hazardous Chem. Data "71 . . 2.75 490 Ammonium Nit rate "70 . . .75

491M Chem. Reactions "71 . . . 3.25 492 Ammoa. Ni t rate, SeP. Dist. '68 .50 493 Process Control Equip. "69 . .75 494L State Fireworks Law '64 . .40 495 Explosives, Stge., Use '70 . .1.25 496 Purged Enciosurus "71 . . . 1.25 498 Explosives, Motor Term. ' 7 0 . .50

50 Bulk Oxygen Systems "71 . . 1.00 50A Gaseous Hydrogen Syst. ' 69 . .50 50B LH-SysL., Consumer Sites "71 1.00 51 Welding and Cutt ing "69 . . .75 51A Acetylene Charging Plants '71 1.00 518 Welding Processes "71 . • 1.00 54 Gas Appliances, Piping ' 69 1.25 54A Indus]. Gas Piping "69 . 1.00 56A Inhalat ion Anesthetics '71 1.75 56B inhalat ion Therapy '68 . .75 56C Hospital Laboratories ' 7 0 . .75 56D Hyperbaric Faci l i t ies ' 70 . 1 .00 56F Nonflam. Med. Gases "70 . .75 57 Fumigation "68 . . . . . . 75 58 LP-Gas Storage, Use ' 69 . . 1.25 59 LP-Gas, U t i l i t y Plants ' 68 . . 1.25 59A LN-Gos, Stg., Handling '71 . 1.75

60 Pulverized Fuel Systs. '61 . . .60 61A Starch Factories "71 . . . 1.00 61B Grain Elevators '70 . . . . 75 61C Flour and Feed Mi l ls "71 . . 1.00 62 Sugar and Cocoa '67 . . . . . $0 63 Explosions Indus. Plants '71 . 1.00 65 Aluminum Processing '70 . . .50 651 Aluminum Powder '67 . . . . 50 652 Magnesium Powder '68 . . .50 653 Coal Preparation Plants '71 . 1.00 654 Plastics, Expl. Prevent. "70 . 1.25 655 Sulfur Fires "71 . . . . 1.00 656 Spice Grinding Plants '71 . 1.00 657 Confectionery Plants "67 . . .50 66 Pneumatic Conveying '70 . . .75 664 Woodworking, Wood Flour "71 1.00 68 Explosion Venting '54 . . . . 75 69 Explosion Prey. Syst. '70 . . 1.25

70 Nat ' l Electr ical Code '71 . . 3.50 70A Dwel l ing Electr ical Code '69 1.75 71 Central Station Sig. '70 - 1.00 72A Local Protective Syst. ' 6 7 .60 72B Aux i l ia ry Sig. Syst. '67 . .60 72C Remote Station System '67 .60 72D Proprietary SIg. Syst. '67 .60 73 Municipal Alarm Syst. '67 . .60 7,1 Household Warning Syst. ' 67 .50 75 Electronic Computer Syst. '68 .75 76A Hospital Elec. Systems "71 . 1.00 76BM Electr ic i ty in Hospitals "71 2.50 76CM High-Freq. EIoc. Equip. "71 1.00 77 Stat ic Electr ic i ty '66 . . . 1.00 70 Lightning Prut. Code '6B . . 1.25 79 Electr ical Motaiworking

Machine Tools '71 . . . . 1.50

BO Fi re Doors, Windows "70 . . 2.00 80A Exposure Fires, Prot. '70 . .75 81 Fur Storage, Cleaning "69 . . .75 82 Incinerators, Rubbish "71 . . 1.25 85 Watertube Boiler-Furnaces '67 .75 858 Gas Mul t i -Burnor Boiler '71 . 1.75 B5D 011 Mul t i -Burner Boiler '71 . 1.75 85E Coal Mul t i -Buruer Boiler "71 i . 75 86A Ovens and Furnaces '71 . . 2.50 86B Industr ial Furnaces '71 . . 2.00 87 Piers and Wharves '71 . . . 1.25 8B Garages '6B . . . . . . . 75 89M Heat Equip. Clearances "71 . 1.00

90A A i r Conditioning Syst. '71 . 1.00 90B Residence Warm A i r Htg. '71 . 1.00

91 Blower and Exhaust Syst. '61 . .50 96 Vapor Removal Cooking Eq. '71 1.00 97M Glossary, Heating Terms '68 . .50

101 Life Safety Code '70 . . . 2.00 102 Tents, Grandstands, A i r -

Supported Structures '67 . . .60

203M Roof Coverings *70 . . .50 204 Smoke, Heat Venting '68 . .50 206M Bui lding Areas "70 . . .50 211 Chimneys, Venting Syst. '71 1.25 214 Water Cooling Towers '71 1.C0 220 Std. Types Bldg. const. '61 .40 224 Homes Forest Areas ' 69 . .75 231 Indoor General Storage '70 .75 231A Outdoor Gen'l. Storage '70 .50 231B Cel lular Rubber, Storage '68 .75 231C Rack Storage of Matls. '71 . ! . 75 232 Protection of Records "70 . 1.50 241 Bldg. Constr. Operation '68 . .50 25t Fire Tests Bldg. Marl. "69 . .75 252 Fire Tests Door Assem. ' 69 . .50 255 Flamespread Tests ' 69 . . . . SO 256 Tests Roof coverings '70 . . .50 257 Window Assemblies '70 . . .50

302 Motor Craft '68 . . . . . 1.25 303 Marinas and Boatyards ' 69 . 1 .00 306 Gas Hazards on Vessels '71 . 1 .00 307 Marine Terminals ' 67 . . . . 60 312 Vessels, Constr.-Repalr "70 . .50

402 Aircraf t Rescue Procnd. ' 69 . 2 .00 ,103 Aircraf t Rescue Services "71 ] .50 406M Handling Crash Fires '68 1.00 407 Aircraf t Fuel Serv ic ing "71 1.75 408 Aircraf t Extinguishers '70 .50 409 Aircraf t Hangars '71 . . 1.50 410A EIOC. Syst. Malnt. '68 . .50 410B Oxygen Syst. Maint. "71 . 1.00 410C Fuel Syst. Malnt. "71 1.2.5 410D Aircraf t Painting '71 1.00 410E Aircraf t Welding "70 . . .50 410F Aircraf t Cabin Clean. '70 .50 411 Aircraf t Ramp Hazard '70 .50 412 Testing, Foam Vehicles '69 3 5 414 Rescue Vehicles '70 . . 2 .00 415 Fueling Ramp Drainage '66 .50 416 Airport Terminals ' 67 . . .50 • 417 Loading Walkways '68 . . .50 418 Roof-Top Heliports '6B .50 419 Airport. Water Systems '69" .75

501A Mobile Home Pks. '71 . . 1.25 501B Mobile Homes "71 . . 2.50 SOlO Recreational Vehicles '70 . 2.00 501D Rocreatlonal Vehicle Pks. '71 1.00 505 Power Industr ial Trucks "71 . 1.00 512 Truck Fire Protection "70 . . .75 513 Motor Freight Terminals '71 . 1.00

601 Guard Service '68 . . . . . 50 601A Guard Operations '68 . . .50 602 Community DumPs '64 . . . . 50 604 Salvaging Operations '64 . . .50

701 Fire Tests, Textiles, Fi lms ' 69 .75 702 Wearing Apparel '68 . . . . 75 703 Fire Retardants 81dg. M a l l . . .40 704M identif ication of Materials . .75

801 Radioactive Math Foclh ' 7 0 . .75 802 Nuclear Reactors ' 6 0 . . . . 75

901 Fire Reporting System '71 . 3.50 901AM Field Incident Manual '71 . 1.50 910 Library Collections "70 . . .75 911 Museum Collections ' 69 . . .75


LOCAL PROTECTIVE SIGNALING SYSTEMS 1967 handbook/NFPA 72A 1967.pdf · Local Protective Signaling Systems for Watchman, Fire Alarm and Supervisory Service NFPA No. 72A~ 1967 A device

Documents