ASTM_F_855_-_15.pdf

Designation:F85515Standard Specifications forTemporary Protective Grounds to Be Used on De-energizedElectric Power Lines and Equipment1This standard is issued under the fixed designation F855;the number immediately following the designation indicates the year of originaladoption or,in the case of revision,the year of last revision.Anumber in parentheses indicates the year of last reapproval.Asuperscriptepsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 These specifications cover the equipment making up thetemporary grounding system used on de-energized electricpower lines,electric supply stations,and equipment.1.2 It is common practice for the users of protectivegrounding equipment to prepare complete instructions andregulations to govern in detail the correct use and maintenanceof such equipment.1.3 The uses and maintenance of this equipment are beyondthe scope of these specifications.1.4 These specifications for a system of protective ground-ing utilizing copper cables are covered in four parts,as follows:SectionsClamps for Temporary Protective Grounds4 16Ferrules for Temporary Protective Grounds17 30Cables for Temporary Protective Grounds31 39Protective Grounds(Complete Assembly With Clamps,Ferrules,and Cable)40 521.5 Each of the four parts is an entity of itself,but is listedas a part of the system for completeness and clarification.1.6 Currents presented in Table 1 are based upon cablemelting times,as determined from equations by I.M.Onder-donk and are to used in situations involving an asymmetryvalue less than 20%(X/R 1.8).See Appendix X3.1.6.1 Currents presented in Table 2 are based upon thevalues from EPRI Project RP2446 Computer Program RTGC“A Desktop Computer Program for Calculating Rating ofTemporary Grounding Cables”and are to be used in situationsinvolving an asymmetry value greater then 20%(X/R 1.8),see Appendix X4.NOTE1Table 1 represents the clamp and assembly ratings that existedprior to this revision.Table 2 represents new ratings now required for highX/R situations.1.6.2 See Appendix X3 and Appendix X4 for a discussionof these topics.1.7 The values stated in Newton-Meter units are to beregarded as the standard.The values in parentheses are theinch-pound units.1.8 The following precautionary caveat pertains to the testmethod portions,Sections 12 and 25 of these specifications:This standard does not purport to address all of the safetyconcerns,if any,associated with its use.It is the responsibilityof the user of this standard to establish appropriate safety andhealth practices and determine the applicability of regulatorylimitations prior to use.2.Referenced Documents2.1 ASTM Standards:2B172 Specification for Rope-Lay-Stranded Copper Conduc-tors Having Bunch-Stranded Members,for Electrical Con-ductorsB173 Specification for Rope-Lay-Stranded Copper Conduc-tors Having Concentric-Stranded Members,for ElectricalConductorsD470 Test Methods for Crosslinked Insulations and Jacketsfor Wire and CableD753 Specification for General Purpose PolychloropreneJacket for Wire and Cable(Withdrawn 1984)3D2219 Specification for Poly(Vinyl Chloride)Insulation forWire and Cable,60C OperationD2633 Test Methods for Thermoplastic Insulations andJackets for Wire and CableD2768 SpecificationforGeneral-PurposeEthylene-Propylene Rubber Jacket for Wire and Cable(Withdrawn2007)3D2770 SpecificationforOzone-ResistingEthylene-Propylene Rubber Integral Insulation and Jacket for Wireand Cable(Withdrawn 2007)3E8/E8M Test Methods for Tension Testing of Metallic Ma-terials1These specifications are under the jurisdiction of ASTM Committee F18 onElectrical Protective Equipment for Workers and are the direct responsibility ofSubcommittee F18.45 on Mechanical Apparatus.Current edition approved June 1,2015.Published July 2015.Originally approvedin 1983.Last previous edition approved in 2014 as F855 14.DOI:10.1520/F0855-15.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 2.2 ANSI Standard:4C 37.09Standard Test Procedure for AC High-VoltageCircuit Breakers Rated on a Symmetrical Basis2.3 ICEA/NEMA Standard:5ICEA S-19-81/NEMA WC 3-80(R 1986)Rubber InsulatedWire and Cable for the Transmission and Distribution ofElectrical Energy2.4 IEC Standard:6IEC 61230 Ed.2,2008,Portable Equipment for Earthing orEarthing and Short-Circuiting2.5 IEEE Standard:7IEEE 386 Standard for Separable Insulated Connector Sys-tems for Power Distribution Systems Above 600VIEEE 1048 Guide for Protective Grounding of Power LinesIEEE 1246 Guide for Temporary Protective Grounding Sys-tems Used in Substations3.Terminology3.1 Definitions of Terms Specific to This