Designation:F1742−03(Reapproved2011)StandardSpecificationforPVCInsulatingSheeting1ThisstandardisissuedunderthefixeddesignationF1742;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1ThisspecificationcoversacceptancetestingofPolyVinylChlorideinsulatingsheetingforuseasacoveringforprotectionofworkers.1.2Thefollowingsafetyhazardscaveatappliesonlytothetestmethodportion,Sections17-19,ofthisspecification:Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimita-tionspriortouse.See18.1foraspecificwarningstatement.2.ReferencedDocuments2.1ASTMStandards:2D149TestMethodforDielectricBreakdownVoltageandDielectricStrengthofSolidElectricalInsulatingMaterialsatCommercialPowerFrequenciesD412TestMethodsforVulcanizedRubberandThermoplas-ticElastomers—TensionD570TestMethodforWaterAbsorptionofPlasticsD747TestMethodforApparentBendingModulusofPlas-ticsbyMeansofaCantileverBeamD1004TestMethodforTearResistance(GravesTear)ofPlasticFilmandSheetingD1048SpecificationforRubberInsulatingBlanketsD1746TestMethodforTransparencyofPlasticSheetingD2240TestMethodforRubberProperty—DurometerHard-ness2.2AmericanNationalStandard:3ANSIC84.1VoltageRatingsforElectricPowerSystemsandEquipment(60Hz)3.Terminology3.1Definitions:3.1.1voltage,maximumuse—theacvoltage(rms)classifi-cationoftheprotectiveequipmentthatdesignatesthemaxi-mumnominaldesignvoltageoftheenergizedsystemthatmaybesafelyworked.Thenominaldesignvoltageisequaltophase-to-phasevoltageonmultiphasecircuits.3.1.1.1Discussion—Ifthereisnomultiphaseexposureinasystemarea,andthevoltageexposureislimitedtophase(polarityondcsystems)togroundpotential,thephase(polarityondcsystems)togroundp...
