g 1604011

ENGINEERING GUIDE EG 16-4-1.1

Electrical Grounding Page 1 of 23

(This practice is appropriate for attachment to Inquiry or Purchase Document) Rev. 1 June 2000

ECA / EUSA Regional Engineering Guide

ECA / EUSA

SCOPE

1.1 This Engineering Guide covers preferred methods for grounding equipment and structures.

1.2 Applicable grounding system shown in Figures 1 through 22 should be used and specified on drawings andsketches. Grounding requirements are covered in IP 16-4-1.

INSTALLATION

2.1 Ground rods are to be located and installed as follows:

a. The horizontal distance from the point where a ground wire goes underground to a ground rodconnection is not greater than 5 ft. In addition, the horizontal distance between ground rods is 10 ftminimum.

b. Ground rods are installed before attaching connector and wire.

c. Ground rods are driven in undisturbed soil to their full length.

d. Installations are backfilled only after Owner's Inspector has approved the installation.

2.2 Conduit assemblies, clamps,connectors and wire or cable connections to these items shall all be wrenchtight.

2.3 After installation,all ground wire connections shall be completely covered with protective coating, describedherein under MATERIALS." Connectors and cable shall be free of dirt and dry before coating is applied.

MATERIALS

3.1 Grounding conductors: stranded copper bare or insulated with a minimum of 600v, PVC, NEC Type THWInsulation. Minimum sizes for underground and aboveground conductors shall be #2/0 Awg for main groundwires and #2 Awg for all branch grounding connections to equipment.

3.2 Ground rods: 3/4 in. diameter by 10 ft long, copperweld", Hubbard Co. #9450 or equal.

3.3 Clamps for ground rod: pure wrought copper, compression connectors, equal to Burndy Company's TypeYGL" in sizes as shown in Table 1, below, or welded per Figures 14 and 15 on page 17.

TABLE 1

RODSIZE

CONDUCTORSIZE (AWG)

BURNDYCAT. NO.

1/2 - 5/8 6 Sol.-2 Str. YGL29C2

1/2 - 5/8 6 Sol.-2 Str. YGL29C29

5/8 - 3/4 6 Sol.-2 Str. YGL34C2

5/8 - 3/4 2 Str.-250MCM YGL34C29

5/8 - 3/4 250MCM-500MCM YGL34C34

TABLE 2

CONDUCTOR SIZE (AWG)BURNDYCAT. NO.

RUN TAP

6 Sol.-2 Str. 6 Sol.-2 Str. YGL2C2

1 Str.-250MCM 6 Sol.-2 Str. YGL29C2

2 Str.-250MCM 2 Str.-250MCM YGL29C29

250MCM-500MCM 6 Sol.-2 Str. YGL34C2

250MCM-500MCM 2 Str.-250MCM YGL34C2

250MCM-500MCM 250MCM-500MCM YGL34C34

Changes shown by

EG 16-4-1.1 ENGINEERING GUIDE

Page 2 of 23 Electrical GroundingRev. 1 June 2000 (This practice is appropriate for attachment to Inquiry or Purchase Document)


ECA / EUSA

TABLE 3

PIPE SIZE BURNDY NO.

3/4 in. GAR 1426-TN

1 in. GAR 1626-TN

1-1/4 in. GAR 1526-TN

1-1/2 in. GAR 1726-TN

2 in. GAR 1826-TN

2-1/2 in. GAR 1926-TN

3 in. GAR 2026-TN

3-1/2 GAR 2126-TN

4 in. GAR 2226-TN

TABLE 4

CABLE SIZE BURNDY NO.

2 Str. YGA2C-2N

2/0 Str. YGA26-2N

4/0 Str. YGA28-2N

250MCM YGA29-2N

500MCM YGA34-2N

3.4 Connectors for grounding cable to pipe: copper alloy body, tin plated, with silicon bronze U-bolt,lockwashers, and nuts; cable range No. 4 Awg solid through No. 2/0 Awg stranded, equal to BurndyCompany's Type YGA" connectors in the sizes shown in Table 3 above.

3.5 Cable connectors: be pure wrought copper, compression connectors equal to Burndy Company's TypeYGL" in the - sizes shown in Table 2 on page 1.

3.6 Connectors for grounding cable to flat bar: copper alloy body, tin plated, with silicon bronze bolt, nut, andlockwasher, for cable range No. 4 Awg solid through No. 2/0 Awg stranded, equal to Burndy Company's No.GB-26 except bolt shall be long enough for connector to grip 1/2 in. thick bar.

3.7 Lugs for cable: pure wrought copper, compression connectors equal to Burndy Company's Type YGB" inthe sizes shown in Table 4 above.

3.8 Hubs: Myers Company's Type ST" or STA" in the following sizes:

TABLE 5

CONDUIT SIZE MYERS COMPANYNUMBER

1/2 in. ST-1 Or STA-1

3/4 in. ST-2 Or STA-2

1 in. ST-3 Or STA-3

1-1/4 in. ST-4 Or STA-4

1-1/2 in. ST-5 Or STA-5

2 in. ST-6 Or STA-6

2-1/2 in. ST-7 Or STA-7

3 in. ST-8 Or STA-8

3-1/2 in. ST-9 Or STA-9

4 in. ST-10 Or STA-10

3.9 Protective coating material: W. R. Grace & Company's NO-OX-ID A Special" or equal approved by Owner.





ECA / EUSA

3.10 Grounding end bushings: O-Z/Gedney Company's Type BLG" or equal, in the sizes shown in Table 6,below.

TABLE 6

CONDUIT SIZE O-Z/GEDNEY'SNUMBER

1/2 in. BLG-0504

3/4 in. BLG-0704

1 in. BLG-1104

1-1/4 in. BLG-1204

1-1/2 in. BLG-1504

2 in. BLG-2004

2-1/2 in. BLG-2604

3 in. BLG-3104

3-1/2 in. BLG-3604

4 in. BLG-4104

5 in. BLG-5104

6 in. BLG-6104

Revision Memo

4/95 Revision 0 - Original Issue of Engineering GuideThis Engineering Guide replaces EXES 16-4-1-1C, Rev. 1.

6/00 Revision 1This is a reaffirmation of EG 16-4-1.1, Rev. 0, 4/95. Minor editorial changes only.

Exxon Company, U.S.A., Exxon Chemical Americas, 1995, 2000




ECA / EUSA

FIGURE 1PANELBOARD WITH MAIN CIRCUIT BREAKER IN SEPARATE HOUSING

SERVICE CONDUCTOR GROUND WIRE &

JUMPERCONDUIT FOR GROUND

WIRE

#2 Or SMALLER #8 1/2

#1 Or #1/0 #6 1/2

#2/0 Or #3/0 #4 1/2 in.

#4/0 Thru 350MCM #2 3/4 ft

Ground Wire to be PVC insulated.





ECA / EUSA

FIGURE 2TYPICAL GROUND WELL

Notes:(1) Main loops to be #2/0 Awg cable bare or, type THW, medium-hard drawn stranded copper.(2) Ground connector 3/4 in. rod to #2 or #2/0 conductor to be Burndy #GAR6426 or equal. For connection to 2

or 3 equal conductors use Burndy #GK6426 or equal.(3) Branches to be #2 Awg cable, type THW, medium-hard drawn stranded copper.(4) For extended rods use threaded ground rods in 10 ft length with coupling and driving stud. (HUBBARD

#9535 & 29535)(5) The concrete indicated under bell of pipe may be omitted - in unpaved areas where no vehicular traffic is

anticipated.




ECA / EUSA

FIGURE 3WALL OR COLUMN MOUNTED GROUND BUS

1/2"-13 Cinch AnchorRed Head #S-12 or Equal

9/16"for 1/2"-13 Bolt

j Hole1/2"-13 SiliconBronze Bolt & Washer

5" (TYP.)

SteelColumn Braze to Steel Column

Plan - Wall Mounted

5" for FireProofed Columns

Plan - Column Mounted

Drill & Tap for1/2"-13 Bolt(TYP. 5 Places)

Burndy #KC26Servit PostConnector

1/4" X 2" Copper Bus Bar

#2/0 Awg THW, Cu. Cable (Branch)

Galv. Steel Conduit Use PVC Conduit Outdoors

Extend Cond. Below Paving, Terminate,and Continue Ground Wire by Direct Burial.

#2/0 Awg THW, Cu.Cable (Tap)

1" Galv. Steel BushingUse PVC Conduit Outdoors

Top of Column FTG.or Floor Slab

Elevation - Wall Mounted Ground Bus(Column Mounted Ground Bus Similiar)

Notes:(1) Equipment ground shall be obtained through conduit system at Baton Rouge and Baytown; through ground

wire inside conduit at Benicia, and through a supplemental ground rod at Baton Rouge, unless otherwisespecified.

(2) When grounding electric motors, where conduit is used for ground return; if switch, motor and pushbuttonare connected with rigid conduit and all threads are made up tight, no additional grounding is required atmotor or pushbutton.

(3) When sealtight flexible conduit is used, a separate external bonding jumper shall be installed around flexibleconduit. See Figure 22.

(4) Low voltage is below 600 volts.





ECA / EUSA

FIGURE 4GROUNDING ELECTRIC MOTORS

WHERE CONDUIT IS NOT USED FOR GROUND RETURN

MOTORHORSEPOWER

GROUND RETURNCONDUCTOR SIZE

BURNDY GROUND LUGCAT. NO.

1/2 To 10 #12* YAV10

15 #10* YAV10

20 To 50 #8* YAV8C-L

60 To 100 #6* YAV6C-L

125 To 200 #2* YAV2C-L




ECA / EUSA

FIGURE 5PANELBOARD WITH NO SEPARATELY ENCLOSED MAIN CIRCUIT BREAKER

SERVICE CONDUCTORGROUND WIRE &

JUMPERCONDUIT FOR GROUND

WIRE

#2 Or SMALLER #8 1/2 in.

#1 Or #1/0 #6 1/2 in.

#2/0 Or #3/0 #4 1/2 in.

#4/0 Thru 350MCM #2 3/4 in.

Ground wire to be PVC insulated.





ECA / EUSA

FIGURE 6GROUNDING STRUCTURES

Column or Support

Column orSupport Foundation

Burndy #KC26or Equal

#2/0 Cu. Ground Wire

1" Cond.

Drill & Tap Columnfor 1/2"-13 Bolt &Install Burndy #KC26Servit Post Connectoror Equal. Coat withNo-Ox-Id Compound AfterInstallation.

#2/0 CopperGround Wire

1" PVEConduit

Top of ConcretePaving or FinishedGrade

Column or SupportFoundation




ECA / EUSA

FIGURE 7(TYPICAL FOR ALL SWITCH RACKS)





ECA / EUSA

FIGURE 8GROUNDING FIREPROOFED STRUCTURES(FOR ALTERNATE ASSY. - SEE FIGURE 3)

SteelColumn

Fireproofing Material

Field Weld

3/4" j Steel Rod Welded To ColumnBefore Fireproofing Is Applied. Drill &Tap Rod for 3/8"-16 Bolt.

Paint with No-Ox-Id GreaseAfter Installation

Ground Connector Burndy#K2C22B1 or Equal

#2 Awg. THW Ground Cable toGround Rod or Ground Bus

PVC Sleeve

Column Foundation




ECA / EUSA

FIGURE 9GROUNDING STORAGE TANKS

(TYPICAL FOR 2 CONNECTIONS 180 APART)

Storage Tank

3" x 1/4" x 0' - 3" SteelAngle - Drill & Tap for3/8"-16 Bolt

Field Weld

Top of Tank FDN.or FinishedGrade

Install Burndy #KC22or Equal - Coat withNo-Ox-Id CompoundAfter Installation

#2 Cu. Ground Cableto Ground Rod or Bus

1" PVC Sleeve(18" Long - TYP.)

Note: See IP 16-4-1 for grounding requirements.





ECA / EUSA

FIGURE 10GROUNDING FOR MOTOR CONTROL CENTERS




ECA / EUSA

FIGURE 11GROUNDING SPHERES

Notes:(1) See IP 16-4-1, Par. 9.8b for grounding requirements.(2) Install 1 in. PVC conduit sleeve and bushing where area is to be paved.





ECA / EUSA

FIGURE 12INSULATING FLANGES

Notes:(1) Insulating kits and materials will be specified on the project piping drawings.(2) All edges of gaskets & washers are to be sealed with protective coating. Joint is to be wrapped with

insulating tape.




ECA / EUSA

FIGURE 13INSTRUCTION! FOR THERMOWELD TYPE GROUNDS

GENERAL INSTRUCTIONS:(1) All surfaces that are to be welded must be bright, clean & dry.(2) Place mould over clean surface with end of conductor under center of tap hole.(3) Cover tap hole with metal disk and empty powder into crucible so that starting powder is at the top of the

crucible. Do not attempt to mix or stir powder.(4) Use flint gun to ignite starting powder.(5) After approximately 10 seconds remove mold and clean slag from crucible before making next weld.(6) Make sure that mold is dry, preheat with torch if required.

WELDERTYPE

CONNECTIONTYPE

THERMOWELDCAT. NO.

THERMOCHANGEHANDLE TYPE

CARTRIDGE SIZE

CC2 #2/0 To #2/0 Tap M-232 8106 # 90

CC2 #2/0 To #2 Tap M-235 8106 # 45

CC2 #2 To #2 Tap M-223 8106 # 45

CS3 #2/0 To Steel M-591 8106 # 90

CS3 #2 To Steel M-588 8106 # 45

CR1 #2 To 3/4 in. GND Rod M-5781 8106 # 90

CR1 #2/0 To 3/4 in. GND Rod M-516 8108 # 90

CR2 #2/0 To 3/4 in. GND Rod M-559 8106 # 115





ECA / EUSA

FIGURE 14THERMOWELD GROUND ROD

FIGURE 15THERMOWELD GROUND ROD

FIGURE 16THERMOWELD CABLE TAPS




ECA / EUSA

FIGURE 17GROUNDING OF TANK CARS AND TANK TRUCKS AT LOADING RACKS

PIPESIZE

S.R. BROWNECO. CAT. NO.

1 in. JR-150-8

1-1/2 in. JR-150-12

2 in. JR-150-16

2-1/2 in. JR-150-20

3 in. JR-150-24

3-1/2 in. JR-150-32

4 in. JR-150-48

Note: Pipe surface are to be wire brushed and thoroughly cleaned before clamping. Paint clamps and 4 in. oneither side with protective coating.

Special Note: Cargo tanks (Tank Trucks) in which flammable vapors are to be present, while being loaded through topdomes, should be electrically bonded to fill stem piping. For tank car loading, bonding to tracks should beadequate.





ECA / EUSA

FIGURE 18GROUNDING FOR TANK TRUCKS LOADING & UNLOADING

PLAN VIEW

VIEW A - A"

Note: Surfaces are to be wired brushed and thoroughly cleaned before clamping. Paint Clamps and 4 in. on eitherside with protective coating.

PIPESIZE

S.R. BROWNECO. CAT. NO.

1 ft JR-150-8

1-1/2 in. JR-150-12

2 in. JR-150-16

2-1/2 in. JR-150-20

3 in. JR-150-24

4 in. JR-150-32

6 in. JR-150-48




ECA / EUSA

FIGURE 19GROUNDING OF LOADING RACKS

ELEVATION

PLAN

Note: Surfaces are to be wired brushed and thoroughly cleaned before clamping. Paint Clamps and 4" on either side withprotective coating.

PIPE SIZES.R. BROWNECO. CAT. NO.

1 in. JR-150-8

1-1/2 in. JR-150-12

2 in. JR-150-16

2-1/2 in. JR-150-20

3 in. JR-150-24

3-1/2 in. JR-150-32

4 in. JR-150-48





ECA / EUSA

FIGURE 20GROUNDING RAILROAD TRACKS AT LOADING RACKS




ECA / EUSA

FIGURE 21CONDUIT ENTRY DETAIL

CONDUIT GROUNDING DETAILFOR FIREPROOF PULLBOXES

Note: For fireproof boxes use 3-1/2 in. long stud.





ECA / EUSA

FIGURE 22FLEXIBLE CONDUIT BONDING DETAIL

FLEXIBLECONDUIT

SIZE

BONDINGJUMPERMINIMUMAWG SIZE

1/2 in. #12

3/4 in. #10

1 in. #8

1-1/4 in. #6

1-1/2 in. #6

2 in. #4

2-1/2 in. #2

3 in. #2

4 in. #2/0

Main ScreenEA 0-0-2 Numerical IndexEA 16-0-0 Electrical Section Table of Contents

g 1604011

Documents

ground rods

mcm ygl34c2250mcm

cable connectors

grounding cable

mcm ygl34c34table

mcm ygl34c2958

mcm ygl29c29250mcm

mcm ygl34c34changes