1. Scope

1.1 These specifications cover the equipment making up the temporary grounding system used on de-energized electric power lines, electric supply stations, and equipment.

1.2 It is common practice for the users of protective grounding equipment to prepare complete instructions and regulations to govern in detail the correct use and maintenance of such equipment.

1.3 The use and maintenance of this equipment are beyond the scope of these specifications.

1.4 These specifications for a system of protective grounding utilizing copper cables are covered in four parts, as follows:

1.5 Each of the four parts is an entity of itself if desired, but is listed as a part of the system for completeness and clarification.

1.6 The values stated in Newton-Meter units are to be regarded as the standard. The values in parentheses are the inch-pound units.

1.7 Currents presented in Tables 1 and 3 are based upon cable melting times, as determined from equations by I.M. Onderdonk. See Appendix X3.

1.7.1 Currents presented in Table 5 were determined by use of EPRI Project RP2446 Computer Program RTGC 'A Desktop Computer Program for Calculating Rating of Temporary Grounding Cables'.

1.7.2 See Appendix X3 for a discussion of these values.

1.8 The following precautionary caveat pertains to the test method portions, Sections 12 and 25 of these specifications: This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. For a specific precautionary statement, see 32.2.3.

2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

ASTM Standards

B172 Specification for Rope-Lay-Stranded Copper Conductors Having Bunch-Stranded Members, for Electrical Conductors

B173 Specification for Rope-Lay-Stranded Copper Conductors Having Concentric-Stranded Members, for Electrical Conductors

D470 Test Methods for Crosslinked Insulations and Jackets for Wire and Cable

D753

D2219 Specification for Poly(Vinyl Chloride) Insulation for Wire and Cable, 60C Operation

D2633 Test Methods for Thermoplastic Insulations and Jackets for Wire and Cable

D2768 Specification for General-Purpose Ethylene-Propylene Rubber Jacket for Wire and Cable

D2770 Specification for Ozone-Resisting Ethylene-Propylene Rubber Integral Insulation and Jacket for Wire and Cable

E8/E8M Test Methods for Tension Testing of Metallic Materials

ANSI Standard

ICEA/NEMA Standard

IEC Standard

IEEE Standard

Keywords

Current measurement; Electrical insulating materials--specifications; Electrical power systems--specifications; Electrical protective equipment--specifications; Grounding; Protective grounds; Temporary grounding systems

ICS Code

ICS Number Code 29.120.50 (Fuses and other overcurrent protection devices)

DOI: 10.1520/F0855-97E01

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