Cut Sheet

Seattle City Light
MATERIAL STANDARD
Standard Number:
Superseding:
Effective Date:
Page:
6762.25
April 2, 2014
October 26, 2015
1 of 1
Standards Coordinator
Laura Vanderpool
Standards Supervisor
John Shipek
Unit Director
Darnell Cola
Ground Rods, Copper-Covered, Sectional
1. Ground Rods shall be fabricated from cold-finished carbon steel shafting in accordance with ASTM Specification
A 108, as it applies to Grade 1018.
2. Construction: The covering of the steel core shall be a molecularly-bonded sheath of electrolytic-grade copper having a
minimum thickness of 0.010″. The rods shall have rolled threads at each end for joining together with couplings. The rods
shall conform to the applicable requirements of Underwriters' Laboratories UL-467, except as modified herein.
3. Couplings for sectional rods shall be made of high-strength, corrosion-resistant bronze, internally threaded to fit standard
rods.
4. Driving Studs shall be made of high-strength, hardened steel of SAE 1045 or equal quality.
5. Packaging: The threaded rod ends shall be protected to prevent thread damage during shipment.
6. Reference Specifications:
ASTM A 108, SAE 1045, latest revisions
NEMA Standard Publication GR 1-2001
Underwriters' Laboratories UL-467
7. Stock Unit: EA
8. Approved Manufacturers:
Stock No.
Description
Hubbell
Eritech
Galvan
Industries, Inc.
Southern
Grounding
Products
Wilcor
564235
5/8-in x 5-ft ground rod
–
635850
6255-10MS
CS 586
WA 585CT
564238
5/8-in x 8-ft ground rod
C635880
635880
6258S
CS 588
WA 588CT
564260
3/4-in x 10-ft ground rod
C633400
633400
7510S
CS 3410
WA 3410CT
564074
5/8-in coupling
CTC58
CR-58
60-C
58C
C 158
564075
3/4-in coupling
CTC34
CR-34
70-C
34C
C 134
564604
5/8-in driving stud
CTDH58
DS58
60-DS
DS 58
D 358
013282
3/4-in driving stud
CTDH34
DS34
70-DS
DS 34
D 334
In October 2015, this standard was renumbered from 5642.10 to 6762.25.