CORROSION RESISTANT GROUND RODS AND GROUND ROD CLAMPS - PDF Document

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  1. UG-1: Connectors Greenbook Prepared by: ABB1 013109 CORROSION RESISTANT GROUND RODS AND GROUND ROD CLAMPS Design and Construction Electric Distribution Asset Type: Function: Issued by: Dan Mulkey (DHM3) 06-29-12 Date: Rev. #06: This document replaces PG&E Document 013109, Rev. #05. For a description of the changes, see Page 3. This document is also included in the following manual: • Electric and Gas Service Requirements Manual (Greenbook) Purpose and Scope This document describes corrosion resistant ground rods and ground rod clamps. References Methods of Grounding Steel Transmission Poles and Towers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .TIL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .012566 Method of Grounding Fences and Wire Trellises. . . . .TIL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .020607 Installation of Grounds on Wood Pole Transmission and Distribution Lines . . . . . . . . . . . . . . . . . . . . . . . . .OH: Transformers. . . . . . . . . . . . . . . . . . . .021904 Ground Resistance and Resistivity Measurements. . .ELS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .053241 Location Document Conventional Ground Rods Notes 1. Ground rods shall meet the requirements of ANSI Spec. C33.8 (UL 467). 2. Welded-type connections may be used when welding equipment is available on the job. Dia. Table 1 Conventional Ground Rods Minimum Copper Jacket Thickness (inches) Dimensions Catalog Number Copper Covering Mfr.1 Code Application Dia. Length Nehring Galvan Calpico Eritech Eritech Galvan Nehring NCC 588 6258 CP588 615880 613412 7512 NCC 3410 Steel Core Normal Grounds for Pad-Mount and Pole Grounds 5/8” 8’0” 0.010 187013 Length For Substation Grounds or Ground Rods Larger Than 8’ 0” and All Subsurface Primary Enclosures 3/4” 12’0” 0.010 010098 1 Ground rods are to be furnished with the length and manufacturer’s identification permanently marked on each rod. Figure 1 Ground Rod 013109 Page 1 of 3 Rev. #06: 06-29-12

  2. UG-1: Connectors Greenbook Corrosion Resistant Ground Rods and Ground Rod Clamps Ground Rod Clamps Ground Wire Ground Rod Clamp Setscrew Should Tighten Against the Ground Rod and Not Against the Ground Wire ÇÇÇ ÇÇÇ Install the Ground Wire in the Clamp on the Side Opposite Setscrew Figure 2 Standard Clamp Figure 3 Clamp for Large Wire Ground Rod Detail A Installation of Ground Rod Utility-Grade Ground Rod Clamps 1 Ground Rod Diameter Table 2 Catalog Number GC103-01 GN-62 HDC58H SP58 JAB58HH GC103-02 GN-75 JAB34HH GC103-03 GNS-75 GC-111-3D GAR6434 2022(DQ) Refer to Ground Wire Size − Copper Code Manufacturer Hubbell/Anderson Dossert Eritech Eritech Galvan Hubbell/Anderson Dossert Galvan Hubbell/Anderson Dossert Hubbell/Anderson Burndy Royal Figure 2 5/8” 6 to 1/0 187012 2/0 to 4/0 With 5/8” Diameter Rod and 6 to 1/0 With 3/4” Diameter Rod 5/8” or 3/4” 187017 Figure 2 3/4” 4/0 and 250 kcmil 187024 Figure 3 5/8” or 3/4” 300 to 500 kcmil 187020 1 The setscrew and clamp are to withstand approximately 35-40 foot-lbs. of torque on the setscrew head without cracking or breaking. 013109Page 2 of 3 Rev. #06: 06-29-12

  3. UG-1: Connectors Greenbook Corrosion Resistant Ground Rods and Ground Rod Clamps Sectional Ground Rods Notes 1. Remove the driving head and upper coupling from the ground rod to permit installing a ground rod clamp, (see Table 2 on Page 2), when the ground rod has been driven to its final depth. 2. After driving a second sectional rod, check the rod with a wrench to ensure that the bottom of the second rod is contacting the top of first rod in the threaded coupling. Repeat this check on each additional rod used. Table 3 Dimensions Dia. Sectional-Type Ground Rods Catalog Number S5810T 635800 6260S Code Application Manufacturer Length Driving Head For Deep-Driven Ground Rods (see Document 053241) Calpico Eritech Galvan See Detail D See Detail C 10' 0” 5/8” 10’0” 187021 Threaded Coupling See Note 1 Detail B Sectional Ground Rod See Detail B Table 4 Threaded Bronze Coupling for 5/8” Diameter Sectional-Type Ground Rods Threaded Coupling Size For Connecting Ground Rods (see Table 3) Catalog Number C158 CR-58 60−C Code Application Mfr. 10' 0” 5/8” Dia. Calpico Eritech Galvan 5/8” 187022 Detail C Threaded Bronze Coupling Threaded Coupling See Detail C 10' 0” Table 5 Driving Head for 5/8” Diameter Sectional-Type Ground Rods Driving Head Size Catalog Number D358 DS58 60−DS Code Application Mfr. Figure 4 Typical Assembly Calpico Eritech Galvan Detail D Driving Head For Driving Ground Rods (see Table 3) 5/8” 187023 Revision Notes Revision 06 has the following changes: 1. Updated Table 2 on Page 2. 013109 Page 3 of 3 Rev. #06: 06-29-12