168889712 SP 1111 Temporary Electrical Supplies for Construction Maintenance Work

8/12/2019 168889712 SP 1111 Temporary Electrical Supplies for Construction Maintenance Work

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Petroleum Development Oman L.L.C.

Electrical Infrastructure

Specification for TemporaryElectrical Supply for

Construction and MaintenanceWork

User Note:

The requirements of this document are mandatory. Non-compliance shall only beauthorised by the Document Owner or his Delegate through STEP-OUT approval.

controlled copy of the current version of this document is on !DO"s #D$%.&efore ma'ing reference to this document( it is the user"s responsibility to ensurethat any hard copy( or electronic copy( is current. )or assistance( contact theDocument Custodian or the Document *ontroller .

Users are encouraged to participate in the ongoing improvement of this document byproviding constructive feedback .

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T!ey also apply to t!is Document"

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Petroleum Development Oman LLC Versio:4.0

Effective: Apr.06

+ut!orised /or Issue +pril ,--

!age + Specification for Temporary Supply for Constr. and Maint. !rinted ,/0

The controlled version of this *$) Document resides online in 1ivelin'2. !rinted copies are UN*ONT3O11#D.




Effective: Apr.06

The following is a brief summary of the / most recent revisions to this document. Details of allrevisions prior to these are held on file by the issuing department.

1ersion &o. Date +ut!or Scope 2 'emarks

4ersion 5. ug 67 &#&/ 8eneral 3evision

4ersion +. 9une66

C.V. Raghavan,OIE/11

*onverted to %pecification as per !DO!olicy *ascade

4ersion ,. Oct. , O. Nilsson( TT#5 8eneral 3evision

4ersion /. pr.0 %aif l ;arthy( U<#/ Updated applicable standards list andreformatted

!age , Specification for Temporary Supply for Constr. and Maint. !rinted ,/0




Contents

+ut!orised /or Issue +pril ,--...............................................................,

Contents......................................................................................................*

*. Introduction.............................................................................................3

5.5 !U3!O%#................................................................................................,

5.+ !!1<*&1# %TND3D%( 3#8U1T<ON% ND D4<%O3= 1#)1#T%....,5.+.5 #quipment %tandards.................................................................................,5.+.+ <nstallation %tandards................................................................................./5.+., dvisory 1eaflets......................................................................................../

5.+.,.5 ;ealth and %afety #>ecutive ?U@A 8uidance Notes...................../5.+.,.+ *onstruction <ndustry Training &oard ?U@A.................................../

, Scope........................................................................................................4

+.5 *1%%<)<*T<ON O) TOO1%..................................................................B

+.+ C#1D<N8 $*;<N#%.............................................................................B

+., D<%T3<&UT<ON %=%T#$.........................................................................B

+.,.5 &asis..........................................................................................................B+.,.+ %ource of %upply........................................................................................B+.,., Distribution and Utilisation 4oltages...........................................................0+.,./ %upply %ystem for !ortable Tools..............................................................0

+.,./.5 $ains *onnected %ystem.............................................................0+.,./.+ Celding %et *onnected %ystem...................................................7

+.,.B %ystem *apacity 3equired.........................................................................+.,.0 %ystem %ingle 1ine Diagram......................................................................

+.,.0.5 *ontent and !reparation...............................................................+.,.0.+ *omponent and %ystem <dentification..........................................+.,.0., dditional Data.............................................................................

+./ #3T;<N8................................................................................................6

+./.5 8eneral......................................................................................................6+./.+ !ortable ;and ;eld Tools %ystem.............................................................6

+.B #EU<!$#NT.............................................................................................6+.B.5 Distribution #quipment...............................................................................6+.B.+ !lugs( %oc'et Outlets and *ouplers.........................................................5+.B., *able........................................................................................................55

+.0 <N%T11T<ON.......................................................................................5++.0.5 8eneral....................................................................................................5++.0.+ Distribution #quipment 1ocation..............................................................5++.0., *ables......................................................................................................5+

+.0.,.5 *able )i>ing...............................................................................5++.0.,.+ *able Termination......................................................................5,

+.0.,., *able #>tension.........................................................................5,+.0./ Celding 8enerators.................................................................................5,

+.0./.5 #arthed system...........................................................................5,+.0./.+ Non #arthed system...................................................................5,

+.7 T#%T<N8 ND <N%!#*T<ON.................................................................5/+.7.5 %ystem Testing........................................................................................5/+.7.+ !lanned <nspection...................................................................................5/+.7., <nspection %ystem....................................................................................5B

+.7.,.5 <mplementation...........................................................................5B+.7.,.+ 3epairs.......................................................................................5B

+. DO*U$#NTT<ON.................................................................................5B

FIGURES




Effective: Apr.06

/I5%'E * and , ) CI'C%ITS /O' PO'T+0LE TOOLS.........................*

/I5%'E 3 ) CI'C%IT /O' E+'T6ED +%7ILLI+'8 S%PPL8 /'OMWELDI&5 SETS........................................................................................*9

/I5%'E : ) CI'C%IT /O' &O&)E+'T6ED +%7ILLI+'8 S%PPL8 /'OM

WELDI&5 SETS........................................................................................*9+PPE&DI7 * ) T8PIC+L SI&5LE LI&E DI+5'+M..................................*;

+PPE&DI7 , ) ELECT'IC+L LO+D +SSESSME&T D+T+ S6EET.......*<

+PPE&DI7)3 ) DCS S8STEM ELECT'IC+L S%PPL8............................,-

+PPE&DI7 : ) +&CILL+'8 ITEMS /O' S%0ST+TIO&S......................,*

+ppendi= +( 5lossary of Definitions> Terms and +$$reviations........,3

SP %SE')COMME&T /O'M....................................................................,:

!age + Specification for Temporary Supply for Constr. and Maint. !rinted ,/0





Effective: Apr.06

*. Introduction

*.* P%'POSE

This %pecification ?%!A is for use by all *ontractors involved in %ite construction wor'for !DO. <t specifies the type of electrical equipment *ontractors shall use for thedistribution and utilisation of electricity for construction and related purposes on allconstruction Cor'sites( and gives guidelines for the safe installation( use andmaintenance of this equipment.

This %! does not cover:

• %upply of camps ?refer to %!-555A.

• Cor' permit system ?refer to 8U-+7, and !DO ;%#%$A.

*., +PPLIC+0LE ST+&D+'DS> 'E5%L+TIO&S +&D +D1ISO'8LE+/LETS

#quipment shall be manufactured and installed in accordance with the following%tandards( but other recognised national and international standards may beacceptable( subFect to approval by the *ompany at the tender stage. 1atest editionsof the listed standards( with all amendments( shall be used.

*.,.* E?uipment Standards

<#* 0,6 !lugs( %oc'et-Outlets and *ouplers for <ndustrial purposes

<#* 07/B ;and held $otor-Operated #lectric Tools - %afety

<#* 07BB 8eneral 3equirements for 3esidual *urrent Operated!rotective Devices

<#* 05+6 %afety of Transportable $otor-Operated #lectric Tools

&% /,0, %pecification for Distribution ssemblies for 3educed 1ow4oltage #lectricity %upplies for *onstruction and &uilding %ites

<#* 0B+ #>truded %olid Dielectric <nsulated !ower *ables for 3ated4oltages from 5 '4 up to , '4.

D#! ,,.0/.5.5 G

*lause /.5.B #lectrical #ngineering 8uidelines

%!-55, mendments %upplements to D#!-,,.0/.5.5-8en(

#ngineering 8uidelines<#* 06/7-5 1ow 4oltage %witchgear and *ontrol 8ear G !art 5: 8eneral

3ules

<#* 0+/B 3ubber <nsulated *ables - 3ated 4oltages up to and <ncluding/B7B 4

*#N#1#* #N 006/-5 %afety 3equirements for rc Celding #quipment !art5: Celding !ower %ourcesH ?%upersedes ;D +/:567,A

&% 0,-B:56 rc Celding !ower %ources( #quipment and ccessories.%pecification for ccessories

&% 07:5665 )le>ible *ables for Use at $ines and Euarries

!age , Specification for Temporary Supply for Constr. and Maint. !rinted ,/0





Effective: Apr.06

*.,., Installation Standards

%!-566 #lectrical <nstallation !ractice ?#3D-0,-5 %uperseded by %!-566A

%!-555 #lectrical %upply of $obile *amps

%!-556 #arthing and &onding

D#! ,,.0/.5.5

ppendi> B #lectrical #ngineering 8uidelines

<## 3egulations for #lectrical <nstallations

&% 7,7B *ode of !ractice for Distribution of #lectricity on *onstructionand &uilding %ites

<#* 0,0/ !arts ,H

/-/5H /-/,H 7-7/ #lectrical <nstallations of &uildings

*.,.3 +dvisory Leaflets

The following documents have been used or referred to in the preparation of this%tandard.

5.+.,.5 ;ealth and %afety #>ecutive ?U@A 8uidance Notes

N8% 0 voidance of Danger from Overhead #lectric 1ines.

N8% +/ #lectricity on *onstruction %ites.

N!$ ,+ The %afe Use of !ortable #lectrical pparatus.

5.+.,.+ *onstruction <ndustry Training &oard ?U@A

*onstruction %afety Notes %ection +( #lectricity.

!age / Specification for Temporary Supply for Constr. and Maint. !rinted ,/0





Effective: Apr.06

, Scope

,.* CL+SSI/IC+TIO& O/ TOOLS

Class * tool having at least basic insulation throughout and undercertain conditions required to be earthed.

&OTE( *lass 5 tools shall not be approved for !DO contracts.

Class , tool with double insulation andor reinforced insulationthroughout and without provision for earthing ?<#* 055/A.

ll class + tools of accepted design have the symbol on the nameplate and areoften referred to as IDouble insulatedI.

Class 3 tool designed for operation at safety e>tra low voltage ?<#*055/A.

Safety E=traLo 1olta#e@SEL1A

nominal voltage not e>ceeding /+ 4olts between conductorsand between conductors and earth. No-load voltage note>ceeding B 4olts

,., WELDI&5 M+C6I&ES

Chen engine driven welding generators are equipped with a +/ 4 au>iliary singlephase winding( supplying soc'et outlets for the use of hand held tools in compliancewith *lass + requirements( the installation shall be fitted with overload and earth faultprotection devices as detailed in +.0./ and )igures , J /. ll soc'ets outlets shall bemounted on the generator.

,.3 DIST'I0%TIO& S8STEM

,.3.* 0asis

The system and equipment described in this %pecification are designed to allow safe(efficient( fle>ible and economic wor'ing on construction wor'sites in all mattersrelating to the distributing and use of electricity.

<nstallation of equipment and cables shall be in accordance with the same stringentstandards used for permanent installations( with minor e>ceptions relating to cablesupports. lthough the installation may be only temporary( the harsh conditions onsite require that the standard of installation should be equal to that of the company"spermanent installations.

<nstallation of equipment on a !DO wor'site shall allow convenient and safe accessto permit authorised and competent operatives to wor' on apparatus contained within.

,.3., Source of Supply

The *ontractor shall be responsible for the provision of electrical power in theconstruction site area. Normally this will be in the form of portable * generator sets.Chere a main supply is available( this requirement may be waived. ;owever( it willbe subFect to agreement with the *ompany. u>iliary soc'et outlets on weldingmachines may be used for the supply of hand tools of *lass +.

$etalwor' of generating sets shall be bonded to metalwor' of the %ite distributionsystem. The star point of a three-phase generating set and the neutral of a single-phase generating set shall be included in the above bonding ?TN-% systemA. Thebonding then should be effectively earthed. )or welding generators refer to +.0./.

!age B Specification for Temporary Supply for Constr. and Maint. !rinted ,/0





Effective: Apr.06

ll generator sets shall be provided with overcurrent and earth-fault protection. Theprotective apparatus should be capable of interrupting( without damage( any short-circuit current that may occur.

,.3.3 Distri$ution and %tilisation 1olta#es

The following voltages shall not be e>ceeded for each application without priorpermission of the company.

T&1# 5 - Utilisation 4oltages

#EU<!$#NT 4O1T8#

)i>ed plant /5B 4 ,-phase

$oveable plant fed via a trailing cable /5B 4 ,-phase

or +/ 4 5-phase

<nstallations in Cor'site buildings +/ 4 5-phase

)i>ed flood lighting +/ 4 5-phase

!ortable and hand-held tools /+ 4 or +/ 4 5-phase

%ite lighting ?other than floodlightingA +/ 4 5-phase

!ortable hand-lamps ?general useA /+ 4 5-phase

!ortable hand-lamps ?confined anddamp situationsA

+B 4 5-phase

,.3.: Supply System for Porta$le Tools

)or portable hand-held tools and equipment( the preferred system shall be a *lass ,%#14 type. n %#14 ?/+ 4A supply shall be derived from a safety isolatingtransformer ?see )igure + and Tables 5( +( ,( / and BA.

!ortable hand-held tools and equipment shall include( but not be limited to handlamps( soldering iron( grinders and drills.

Chen portable hand-held tools of *lass , are not available( as for e>ample withlarger siKes of tools( *lass + tools may be used.

<n the event of *lass + equipment being offered( the *ontractor shall utilise either ofthe following systems( but shall not employ different systems on the same site.

+.,./.5 $ains *onnected %ystem

+/ 4 piece of *lass + equipment shall be connected via an earth lea'ageprotection device of ma>imum , m( protecting both the supply cord and theequipment ?)igure 5 and Tables 5( +( ,( / and BA.

The equipment shall confirm to <#* 07/B and <#* 05+6.

!age 0 Specification for Temporary Supply for Constr. and Maint. !rinted ,/0





Effective: Apr.06

+.,./.+ Celding %et *onnected %ystem

+/ 4 piece of *lass + equipment shall be connected to the au>iliary single phasesoc'et outlet of the welding machine. The welding machine shall be wired as outlinedin +.0./.






Effective: Apr.06

,.3.4 System Capacity 'e?uired

The *ontractor shall be responsible for determining both pea' and average powerrequirements of electrical equipment to be used during the construction period. Thisshall include not only equipment directly used in construction but also ancillaryservices such as site and office lighting( air conditioning( water heaters( etc( and shall

include all equipment at all voltages. The assessment shall ta'e account also ofmotor starting currents to ensure that suitably rated generating equipment has beeninstalled.

The *ontractor shall prepare this assessment for approval by the *ompany prior tomobilisation and shall present it in tabular form with separate columns for eachvoltage level. sample is given in ppendi> +.

,.3. System Sin#le Line Dia#ram

+.,.0.5 *ontent and !reparation

The *ontractor shall prepare a single line diagram of his proposed site distributionsystem( which shall be submitted with the Tender for the construction wor's. &oth

single line diagram and distribution system shall be subFect of approval by the*ompany before commencement of wor' at site. The single line diagram shall beaccompanied by a layout drawing showing proposed initial location of all equipment(identified by the use of numbers on the single line diagram. typical single linediagram is shown in !!#ND< 5( illustrating the principles which shall be followed.The *ontractor may vary both rating and number of units( as convenient.

#ach single line diagram shall give information on:

- #arthing arrangements.

- Number of %ub-$ain Distribution Units ?in addition to the $ain Distribution UnitA.

- Number of Transformer Units.

- Number of Outlet Units.

- ll transformer ratings.- ll switch( fuse( $*& and 3*D ratings.

- ll soc'et outlet ratings.

- ll cable siKes and numbering.

- )i>ed lighting rating.

- Office( wor'shop and similar supplies with ratings.

- ll power supplies to fi>ed equipment at /5B 4 and +/ 4.

+.,.0.+ *omponent and %ystem <dentification

*able numbers shall be stated for all cables( e>cept those to hand tools or lamps.

<dentification numbers shall be stated for all distribution equipment. These numbersshall form part of a rational numbering system and shall be in line with the serialnumbers required by the <nspection 3ecord %ystem ?see %ection +.7.,A.

+.,.0., dditional Data

ccompanying the single line diagram( either as a drawing note or as a separate list(the *ontractor shall also provide additional information on:

- $anufacturing standards( if different to those quoted in this %pecification.

- $anufacturers type and serial numbers of all distribution equipment( preferablywith illustrated leaflets.

- *able types.

!age Specification for Temporary Supply for Constr. and Maint. !rinted ,/0





Effective: Apr.06

,.: E+'T6I&5

,.:.* 5eneral

ll metalwor' of distribution systems and fi>ed equipment not carrying a current shallbe effectively earthed.

*ircuit protection conductors shall be installed to provide the return path from eachunit of any installation to the main earth terminals.

#quipment operating at /5B 4 and +/ 4 shall be earthed in accordance with normal!DO practice.

#arth conductors shall be either +B mm+ or 7 mm+ copper conductor( dependingupon the equipment to be earthed( with green and yellow !4* sheath.

)or metal enclosures( all cable armouring shall be securely made-off( using suitablebrass compression glands with armour clamping rings( and the glands shall be

bonded together. The earthing thus provided by armouring is in addition to theseparate earth conductor described above. ll armoured cables shall be terminatedusing double compression cable glands.

3efer %!-556 ppendi> 5 for more information.

,.:., Porta$le 6and 6eld Tools System

ll portable tools and hand lamps conforming to this %pecification( being either *lass+ or *lass ,( shall not to be earthed.

,.4 EB%IPME&T

,.4.* Distri$ution E?uipment

#quipment constructed in accordance with &% /,0, shall be used. #quipmentmanufactured according to other international standards but embodying the principlesof &% /,0, may also be used( provided it is approved by the *ompany. )ull details ofall distribution equipment to be used shall be submitted with the Tender.

The distribution equipment shall be connected as illustrated in the typical single linedrawing in ppendi> 5.

Of the equipment described and specified in &% /,0,( the only equipment that shallbe used is:

- $ain Distribution Unit ?$DUA

- Transformer Unit ?TUA- Outlet Unit ?OUA

- #>tension Outlet Unit ?#OUA

The principal features of distribution equipment complying with &% /,0, are:

- 3obust enclosure.

- 3ain proof and dust proof enclosure classification according to <! B/ degree of!rotection ?reference <#* 06/7-5A.

- 1ifting lugs and handles.

- #arthing facilities

- !rovision for bonding of cable armouring.

- 1ive parts inaccessible.






Effective: Apr.06

- !adloc'ing facilities on isolators ?"O))" position onlyA.

<n addition to the requirements of &% /,0,( 3esidual *urrent Devices ?3*DsA shall beprovided on all outgoing circuits from $DU and sub-main distribution units.

&OTE: 3*Ds are often 'nown as current operated #arth 1ea'age *ircuit &rea'ers?#1*&sA.

%ensitivity of the earth fault cutout device shall be for:

- *ircuits up to and including 0, : , m

- *ircuits above 0, : 5 m

#quipment identification numbers in accordance with single line diagrams ?see%ection +.,.0A shall be clearly and indelibly mar'ed on all equipment.

,.4., Plu#s> Socket Outlets and Couplers

ll plugs( soc'et outlets and cable-couplers shall conform to the requirements of <#*

0,6.

The *ontractor shall ensure that cable-couplers( e>tension leads and the plugs on theend of hand tools( lamps( etc.( are equipped with the correct components.

ll current-carrying accessories such as plugs( soc'et outlets and cable-couplers shallbe manufactured from robust insulating material( have a degree of protection of <! B/minimum of <#* 06/7-5 and be colour-coded as in Table + and ,.

+C OPE'+TI&51OLT+5E

COLO%'

+B 4ioletB Chite

+/ &lue

/5B 3ed

Table + - *olour-*oding for *urrent-Using ccessories

OPE'+TI&51OLT+5E

POLES E+'T6 PI&POSITIO&

+B + None

B + None

+/( single phase + L # 0 h

/5B( three phase , L # L N 0 h

Table , - !in rrangement for !lugs( %oc'et Outlets and *able-*oupler

&OTE( *lass + and , portable tools and *lass + lamps systems are not earthed.%upply cables between outlet units and tools shall be of two core type. Theearth pins shall remain unconnected.






Effective: Apr.06

,.4.3 Ca$le

ll cables forming part of fi>ed installations shall conform to <#* 0B+ with therequirements specified in Table /

COMPO&E&T M+TE'I+L

*onductor %tranded copper

<nsulation 1!# or !4*

rmouring 8alvanised steel wire or steelbraid. luminium wire forsingle core cables.

Overall %heath !4*?!olyvinyl *hlorideA or;O)3?;eat-3esisting Oil3esistantA sheath

Table / - $aterial for *ables for )i>ed <nstallation

ll cables forming part of re-locatable or portable installation shall conform to <#*0+/B with the requirement specified in Table B

COMPO&E&T M+TE'I+L

*onductor )le>ible ?multi-strandA copper

<nsulation #lasteric

rmouring )le>ible braided unarmouredfor *lass + and *lass ,equipment

Overall %heath ;eavy duty ;O)3 sheath

Table B - $aterial for *ables for 3e-locatable and !ortable <nstallation








Effective: Apr.06

+.0.,.+ *able Termination

ll cables( armoured or unarmoured( terminating in fi>ed power outlets( shall beterminated using compression glands. ll armoured cables shall be terminated using

double compression cable glands with armour clamps.*ables terminating in plugs or soc'ets shall be securely anchored with insulatedclamps at points of entry. tough resilient sheath shall be fitted over the cable andthe mouth of the plug or soc'et( to minimise e>cessive fle>ing.

)or more information on cable termination refer %!-566( ppendi> 5.

+.0.,., *able #>tension

*able Foints shall not be used. <f cable e>tensions are required they shall be madeusing #>tension Outlet Units( as described in %ection +.B.5. Other types of e>tensionsshall not be permitted.

)le>ible leads and cables to portable tools shall be of sufficient length to reach wor'

areas without e>erting any mechanical strain on cable.

,..: Weldin# 5enerators

The au>iliary single phase winding shall be provided with overload protection in theform of a $oulded *ase *ircuit &rea'er ?$**&A and all individual soc'et outlets shallhave an earth lea'age circuit brea'er ?, m / msA. The wiring shall comply to+.0./.5 or +.0./.+ for earthed or non earthed systems respectively.

+.0./.5 #arthed system

moulded case circuit brea'er rated to the ma>imum output current of the generatorau>iliary single phase winding but not e>ceeding 50 ( shall be fitted in the phase

conductor ?1A. n earth lea'age circuit brea'er shall be provided between phase ?1Aand neutral ?NA conductor ?double poleA. The neutral line of the au>iliary single phasewinding shall be bonded to the frame of the welding generator( before the #1*&. <naddition( the frame of the welding machine shall be bonded to an earth electrode witha ma>imum electrode resistance of +B ohm. #>isting plant earthing bonding pointsmay be used. )or wiring diagram see )igure ,.

+.0./.+ Non #arthed system

The neutral of the single phase winding and the frame of the generator shall not?intentionallyA be earthed.

moulded case circuit brea'er rated to the ma>imum output current of the generatorau>iliary single phase winding( but not e>ceeding 50 shall be fitted in the phase

conductor ?1A.

n earth lea'age circuit brea'er ?#1*&A shall be fitted across phase ?1A and neutralconductor ?double poleA between the $**& and the soc'et outlet.

The protective conductor ?!#A shall be bonded to the neutral of the au>iliary singlephase winding i.e. up stream of the #1*&. The generator frame shall be bonded tothe protective conductor. )or wiring diagram( see )igure /.

!age 5, Specification for Temporary Supply for Constr. and Maint. !rinted ,/0





Effective: Apr.06

,.9 TESTI&5 +&D I&SPECTIO&

,.9.* System Testin#

&efore the distribution system is put into service it shall be tested by the *ontractoraccording to the requirements of the <## 3egulations( and subsequently at three-monthly intervals.

Test results shall be recorded on <nspection *ertificates conforming to the specimenin ppendi> ,( copies of which shall be submitted to the *ompany.

Testing and <nspection shall include:

- 4isual inspection.

- *ontinuity of final circuit conductors.

- *ontinuity of protective conductors.

- #arth fault loop impedance.

- !olarity.

- <nsulation resistance.

- Operation of residual current devices by an approved test method.

- #arth electrode resistance.

,.9., Planned Inspection

<n addition to the testing described above( the *ontractor shall implement a system ofplanned inspections of all equipment at regular intervals not e>ceeding two-wee's.The main *ontractor shall ensure that all subcontractors adopt a similar system.!articular attention shall be paid( but not be limited to:

• !ower Tools : <ntegrity of cable and unit general

condition.

• !lugs( %oc'et Outlets( *ouplers : )ree from improvised modifications and

signs of malfunction( mal-operation ormaltreatment.

• *ables : )ree from defects caused by impact or

chaffing.

&OTE( typical chec'list is included as a guide in ppendi> /.

!age 5/ Specification for Temporary Supply for Constr. and Maint. !rinted ,/0





Effective: Apr.06

,.9.3 Inspection System

+.7.,.5 <mplementation

The *ontractor shall be responsible for implementation of an inspectionmaintenancesystem and he shall provide details of his system with the Tender. The followingpoints are the minimum required.

ll portable apparatus shall be identified by a serial number which shall be recordedin a register.

The register shall indicate how often each item should be recalled for routineinspection and maintenance( and a competent person shall be appointed to recovereach item on its due date.

register of competent persons who perform inspection shall be maintained.

tag shall be affi>ed to equipment ?generators( transformers( switchboards( motorsetc.A and tools with the following information( so that it is clear to the <nspector User

when the inspection and maintenance are due:- $aintenance <nspection due date:

- Date carried out:

- *arried out by:

- Ne>t due date:

)requency of recall shall depend on both type and use of apparatus and is bestdetermined in the light of e>perience by a qualified person( ta'ing into account anyrecommendations made by $anufacturers.

&oth inspection and maintenance shall be performed by competent persons(appointed by the *ontractor.

Units which are unserviceable or in unsafe condition shall be withdrawn from use until

defects have been rectified.

+.7.,.+ 3epairs

3epairs shall be performed only by competent persons e>perienced in this 'ind ofwor'.

ll repaired equipment shall be inspected and approved for use by the nominatedcompetent electrical persons before being returned to service.

,.; DOC%ME&T+TIO&

The *ontractor shall establish a register on the wor'site to record and hold

documents relating to the electrical installation. These shall include:- %ingle-1ine Diagrams.

- *ableTrayTrench 3outing.

- 1oad *alculations.

- <nspection Test *ertificates.

- #quipment <nspection 3ecords.

- 3ecords of lterations.

Originals of drawings and at least one print of each shall be 'ept. ll alterations shallbe mar'ed on a master print and the original shall be brought up to date. ll issues ofdrawings shall be retained to record the history of all additions and alterations to thedistribution systems.

!age 5B Specification for Temporary Supply for Constr. and Maint. !rinted ,/0





Effective: Apr.06

FIGURE 1 AND 2 - CIRCUITS FOR PORTABLE TOOLS

2. CORECORD

240 V SINGLEPHASE SOCKETOUTLET SHALLBE FITTED WITHR.C.D.

PORTABLE

250/42 V

ISOLATINGTRANSFORMER

2 PIN PLUG

& SOCKET

HAND HELDTOOL

(CLASS 3)

3-CORECORD

240 V SINGLE PHASE

SOCKET OUTLETSHALL BE FITTED

WITH R.C.D.

HAND HELDTOOL

(CLASS 2)

2. CORE

CORD

*lass + !ortable Tool

)ig.+ *ircuit for /+4

*lass , !ortable Tool

)ig. 5 *ircuit for +/-4






Effective: Apr.06

FIGURE 3 - CIRCUIT FOR EARTHED AUILLIAR! SUPPL! FRO" #ELDING SETS

PH (L)

N

Generator/frame

ELCB30 mA

Socket outlet

R

240V

MCCB 16A

FIGURE $ - CIRCUIT FOR NON-EARTHED AUILLIAR! SUPPL! FRO" #ELDING SETS

PH (L)

N

Generator/frame

MCB 16A

ELCB30 mA

Socket outlet

PE

M CCB 16A

240V

Socket outlet






Effective: Apr.06

APPENDI 1 - T!PICAL SINGLE LINE DIAGRA"



240V,1PH

MCB

10A

MCCB

5A

MCCB 250A

SWITCH/MCCB

100A

MCB

10A

30 A (30 mA) 30 A

(30 mA) (100mA) (100mA) (100mA) (30 mA) 100 A 100 A 30 A 60A

INCOMING SUPPLY

GENERATOR

440V, 3PH MAIN DISTRIBUTION UNIT

(MDU) (R.C.D.'s)

2 c x 10mm 2

TO A/C UNITS, LIGHTING,WATE

PHOTOCOPIERS.ETC.

TRANSFOMER UNIT (TU)

1PHASE 240/24V, 250 VA

16A 16A

2c x 16 mm 2

4 c x 95 mm 2 SWITCH/MCCB

100A M

AIR COMPRESSOR 30 KW

4 c x 50 mm 2 SWITCH/MCCB60A M

CRANE 15 KW 4 c x 95 mm 2 TRANSFOMER

UNIT (TU) 240/50V,

1600VA

32A

1PHASE SKT OUTLETS WITH INTERLOCKING SWITCHES FOR LIGHTING AND PORTABLE TOOLS

SUPPLIES TO FIXED OR PORTABLE EQPT.

SUB DISTR UNIT (R.C.D.)

30A (30mA)

TRANSFORMER UNIT (TU) 2$%/&%V

1'%%VA

32A 16A 16A 16A

SOCKET OUTLETS

440V, 3PH

MCB /SWITCH

SKTS WITH INTERLOCKED

SWITCHE

MCB

5A 240V, 1PH MCB 10/15/20A

MCB

30A




Effective: Apr.06

APPENDI 2 - ELECTRICAL LOAD ASSESS"ENT DATA SHEET

PL+&T :*4 1 3)P6+SE PO'T+0LE TOOLS SITE LI56TI&5

TEMPO'+'8+CCOMMOD+TIO&

,:- 1 *)P6+SE

Type kW &o. Total Type kW &o. Total Location Type kW 'e?uirement kW

Tower *rane *hasers 1ighting;oist ;ammers ir *onditioning

!latform ;oist %aws Cater ;eating

ir *ompressor Drills Drying

!ump " " %anders *oo'ing

!ump " & " 4ibrators $iscellaneous

%aw &ench ir &lowers #>ternal 1ighting

&atching Dehumidifiers

!lant

Total 1oad Total 1oad Total 1oad Total 1oadDiversity )actor Diversity )actor Diversity )actor Diversity )actor Demand 1oad Demand 1oad Demand 1oad Demand 1oad

!age 56 Specification for Temporary Supply for Constr. and Maint. Work !rinted ,/0







Effective: Apr.06

APPENDI $ - ANCILLAR! ITE"S FOR SUBSTATIONS

3# #EU<!$#NT

<N%!#*T<ON 8U<D# 1<N#% *ON)<3$*;#*@#

D

O&%#34T<ON 3#$3@%

8eneral *onfirm single line diagram is correctand current

$aindistribution %ub-main distribution

E&CLOS%'E

Defective door hinges seals.

1oc'ing facilities and devices.

4ermin-proof integrity.

<dentification warning notices.

<ntegrity of earth bonding.

I&TE'&+L +''+&5EME&T.

$issing phase separation panels.

Defective components.<ntegrity of connections and glands.

<ngress of dust and moisture

Transformer E&CLOS%'E

Damaged soc'ets outlets

4ermin proof integrity

<dentification and warning labels

<ntegrity of earth bonding

I&TE'&+L +''+&5EME&T

<ntegrity of connections and glands

Defective components

<ngress of dust and moisture

!lugs %oc'ets Outlets *ouplers

E7TE'&+L

*over damages

*orrect plugs are fitted and colourcoding is correct and distinctive

I&TE'&+L

*able grips fitted

*onnection are correct

*ables E7TE'&+L

#nsure that distribution cables are not

causing a haKard at openings(passages( ladders( stairs etc.

#nsure that cables are not lying onground unprotected from physicaldamage or wet conditions.

#nsure that lighting circuits are usedfor power tools.

Contimue next page

!age +5 Specification for Temporary Supply for Constr. and Maint. !rinted ,/0





Effective: Apr.06

*ables TE'MI&+TIO&

*able identification at both ends

Use of armoured unarmoured cables

<ntegrity of glanding$echanical support of above groundcables.

Terminal bo>es are totally enclosed.

!roper bonding of armour.

*able route mar'ers.

!ortable Tools E7TE'&+L

)itted with correct type andundamaged plug.

Double-insulation symbol on class +tools.

$achines are not damaged.*huc' of drilling machines in goodcondition and correct 'ey attached

I&TE'&+L

&rush gear and commutator

ll screws are in positionsecure.

*able entry to the tool protected withheavy rubber sleeve

Celding sets 8eneral condition of the set.

Cires are not e>posed.

#1*& operating correctly

Overload protection provided

!age ++ Specification for Temporary Supply for Constr. and Maint. !rinted ,/0





Effective: Apr.06

APPENDI A( GLOSSAR! OF DEFINITIONS, TER"S AND ABBREVIATIONS

The following terms and abbreviations used in this specification( are defined below:

8eneral Terminology

*ompany - !etroleum Development Oman 11* o f $uscat( %ultanate ofOman

*ontractor party holding a *ontract with the *ompany and who isresponsible for the construction( commissioning and other relatedwor's specified in the *ontract. *ontractor may be responsiblefor the duties of both *onsultant and *ontractor

$anufacturer - party responsible for the manufacture of material or equipmentto perform the duties specified by the *onsultant( *ontractor orthe *ompany

$ay - The word "may" is to be understood as indicating a possiblecourse of action

%hall - The word "shall" is to be understood as mandatory

%hould - The word "should" is to be understood as strongly recommended

User qualified engineer( *onsultant or *ontractor who applies thesestandards in the e>ecution of a !DO proFect or *ontract

Cor'site - The defined place designated by the *ompany where all Cor'sand services shall be e>ecuted by the *ontractor under the*ontract

bbreviation

&% - &ritish %tandard

D#! Design #ngineering !ractice

#3D - #ngineering 3eference Document

<#* - <nternational #lectrotechnical *ommission

<## - <nstitute of #lectrical #ngineers

$*& $iniature *ircuit &rea'er

$**& - $oulded *ase *ircuit &rea'er

!DO - !etroleum Development Oman 11*.

*)D; - *orporate )unctional Discipline ;ead

%! - %pecification ?!DOA

8U - 8uidelines ?!DOA

!3 - !rocedures ?!DOA

!age +, Specification for Temporary Supply for Constr. and Maint. !rinted ,/0





Effective: Apr.06

SP USER-CO""ENT FOR"

SP %ser)Comment /orm

<f you find something that is incorrect( ambiguous or could be better in an %!( write yourcomments and suggestions on this form. %end the form to the Document *ontrol %ection

?D*%A. They ma'e a record of your comment and send the form to the correct *)D;. Theform has spaces for your personal details. This lets D*% or the *)D; as' you about yourcomments and tell you about the decision.

SP Details T)*+ <ssue Date:

Number:

!age number: ;eading Number: )igure Number:

Comments(

Su##estions(

%sers personal details

Name: 3ef. <nd: S)gna*( Da*(

Phn(

Document Control Section +ctions

*omment Number: Dates *)D;

3ef. <nd.:R0( T CFDH(

C/D6 +ctions

3ecdDate:

Decision(3eFect:

ccept( revise at ne>t issue: ccept( issue temporary amendment

<nits: 3ef.

<nd.:

Date:

*omments:

Originator dvised:

Date: <nits: Document*ontrol %ection dvised:

Date: <nits:

!age +/ Specification for Temporary Supply for Constr. and Maint. !rinted ,/0

168889712 SP 1111 Temporary Electrical Supplies for Construction Maintenance Work

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