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Complementary Documents and Links:. These specifications cover the equipment making up the temporary grounding system used on de-energized electric power lines, electric supply stations, and equipment. 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.
The uses and maintenance of this equipment are beyond the scope of these specifications. Each of the four parts is an entity of itself, but is listed as a part of the system for completeness and clarification.
Currents presented in Table 1 are based upon cable melting times, as determined from equations by I. See Appendix X1. NOTE 1—Table 1 represents the clamp and assembly ratings that existed prior to this revision. See Appendix X1 and Appendix X2 for a discussion of these topics. The values stated in Newton-Meter units are to be regarded as the standard. The values in parentheses are the inch-pound units.
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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade TBT Committee.
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Temporary But Required
TGJAs appear to be very simple devices but are in fact very complex, both electrically and mechanically. Like any safety equipment, TGJAs must be inspected and tested regularly to ensure they are physically intact and capable of protecting workers when needed. These two standards are as follows:. It provides a discussion of the various methods that can be used to test TGJAs. A more precise definition that embodies the purpose of a TGJA is provided in paragraph 3. Potential equalization is achieved with TGJAs by using them to provide a low-impedance parallel path for fault current to flow around the worker.
Train the Trainer 101: ASTM F855 Grounding Equipment Specs Made Simple
Historical Version s - view previous versions of standard. Work Item s - proposed revisions of this standard. More F These specifications cover the equipment making up the temporary grounding system used on de-energized electric power lines, electric supply stations, and equipment. These specifications for a system of protective grounding utilizing copper cables are covered in four parts, as follows: clamps, ferrules, cables, and temporary protective grounds. Each of the four parts is an entity of itself, but is listed as a part of the system for completeness and clarification.