Designation:F855−15StandardSpecificationsforTemporaryProtectiveGroundstoBeUsedonDe-energizedElectricPowerLinesandEquipment1ThisstandardisissuedunderthefixeddesignationF855;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thesespecificationscovertheequipmentmakingupthetemporarygroundingsystemusedonde-energizedelectricpowerlines,electricsupplystations,andequipment.1.2Itiscommonpracticefortheusersofprotectivegroundingequipmenttopreparecompleteinstructionsandregulationstogovernindetailthecorrectuseandmaintenanceofsuchequipment.1.3Theusesandmaintenanceofthisequipmentarebeyondthescopeofthesespecifications.1.4Thesespecificationsforasystemofprotectiveground-ingutilizingcoppercablesarecoveredinfourparts,asfollows:SectionsClampsforTemporaryProtectiveGrounds4–16FerrulesforTemporaryProtectiveGrounds17–30CablesforTemporaryProtectiveGrounds31–39ProtectiveGrounds(CompleteAssemblyWithClamps,Ferrules,andCable)40–521.5Eachofthefourpartsisanentityofitself,butislistedasapartofthesystemforcompletenessandclarification.1.6CurrentspresentedinTable1arebaseduponcablemeltingtimes,asdeterminedfromequationsbyI.M.Onder-donkandaretousedinsituationsinvolvinganasymmetryvaluelessthan20%(X/R≤1.8).SeeAppendixX3.1.6.1CurrentspresentedinTable2arebaseduponthevaluesfromEPRIProjectRP2446ComputerProgramRTGC“ADesktopComputerProgramforCalculatingRatingofTemporaryGroundingCables”andaretobeusedinsituationsinvolvinganasymmetryvaluegreaterthen20%(X/R^1.8),seeAppendixX4.NOTE1—Table1representstheclampandassemblyratingsthatexistedpriortothisrevision.Table2representsnewratingsnowrequiredforhighX/Rsituations.1.6.2SeeAppendixX3andAppendixX4foradiscussionofthesetopics.1.7ThevaluesstatedinNewton-Meterunitsaretoberegardedasthestandard.Thevaluesinparenthesesaretheinch-poundunits.1.8Thefollowingpre...
