Designation:F2522−12StandardTestMethodforDeterminingtheProtectivePerformanceofaShieldAttachedonLiveLineToolsoronRackingRodsforElectricArcHazards1ThisstandardisissuedunderthefixeddesignationF2522;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodisusedtodeterminetheheatattenua-tionfactor(HAF),theeffectiveheatattenuationfactor(EHAF),andtheshieldsmechanicalstrength(SMS)ofashieldattachedonlivelinetoolsorrackingrodsintendedforprotectionofworkersexposedtoelectricarcs.1.2Thematerialsusedinthistestmethodofworkerprotectionareintheformofashieldattachedonlivelinetoolsorontherackingrods.1.3Theprotectiveshielddescribedinthistestmethodshallbetransparentandshallbeeasilyattachedandremovedfromlivelinetoolsorfromrackingrods.1.4Theprotectiveshielddescribedinthistestmethodhas24-in.(0.61-m)diameterandcanbeusedformostapplications,howeverforspecialcases,theshieldcanhavedifferentsizestosuittheprotectiverequirementsoftheapplication.1.5Thisstandardshallbeusedtomeasureanddescribethepropertiesofmaterials,products,orassembliesinresponsetoincidentenergies(thermal-convective,andradiantandpressurewave)generatedbyanelectricarcundercontrolledlaboratoryconditionsanddoesnotpurporttopredictdamagefromlight,resultantpressureimpactotherthanthepressureandthermalaspectsmeasured.1.6Thevaluesstatedininch-poundunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedforinformationonlyandarenotconsideredstandard.1.7Thisstandardshallnotbeusedtodescribeorappraisethefirehazardorfireriskofmaterials,products,orassembliesunderactualfireconditions.However,resultsofthistestmaybeusedaselementsofafireassessment,whichtakesintoaccountallofthefactors,whicharepertinenttoanassessmentofthefirehazardofaparticularenduse.1.8Thisstandarddoesnotpurpor...
