TIS 293-2541 (1998) PVC-insulated aluminium cables(英文)

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1、TIS293-2541(1998)UnofficialTranslationThaiIndustrialStandardforPVCInsulatedAluminiumCables1.Scope1.1Thisstandardspecifiestypes,dimensions,requirements,packaging,markingandlabelling,samplingandcriteriaforconformityandtestingforPVCinsulatedaluminiumcableswithratedvoltagenotexceeding

2、750Vandconductorhavingtemperaturenotexceeding70°C,hereinaftercalled“cables”.1.2Thisstandardcoversonlysingle-corecablesinstalledoutsidethebuildingwithwireholdersandinsulators.2.DefinitionForthepurposesofthisstandard,thefollowingdefinitionsapply:2.1POLYVINYLCHLORIDEorPVC:Combination

3、ofmaterialssuitablyselected,proportionedandtreated,ofwhichthecharacteristicconstituentistheplastomerpolyvinylchlorideoroneofitscopolymers.Thesametermalsodesignatescompoundscontainingbothpolyvinylchlorideandcertainofitspolymers.2.2CORE:Asingleconductorofacablewithitsinsulations.2.3

4、CONDUCTOR:Copperwireofcircularcross-section,whethersolidorstrandedinbundle.2.4STANDEDCONDUCTOR:Aconductorcomposedofagroupofwiresoracombinationofgroupsofwirestwistedorbraidedtogether.2.5COMPACTCONDUCTOR:Astrandedconductorcompactedbymechanicalpressureorbyanyotherprocedure.2.6VOLTAGE

5、:Thevalueofvoltageinrootmeansquare.2.7LAYLENGTH:Theaxiallengthofonecompleteturnofahelixformedbythecoreinthecaseofacable,orofawireinthecaseofastrandedconductor.2.8LAYRATIO:Theratioofthelengthoflaytothemeanoutsidediameterofstrandedconductorinthelayerofstranding.-1-TIS293-2541(1998)2

6、.9MAXIMUMOPERATINGTEMPERATURE:Themaximumoperatingtemperaturetowhichanyportionofthecablemaybeexposedunderconditionsofnormaluse,andisthetemperatureresultingfromthecombinedeffectoftheambienttemperatureriseduetothecurrentloadingontheconductors.2.10MEDIANVALUE:Whenseveraltestresultshav

7、ebeenobtainedandorderedinanincreasingordecreasingsuccession,themiddlevalueifthenumberofavailablevaluesisodd,andisthemeanofthetwomiddlevaluesifthenumberiseven.3.Types3.1Cablesshallbeclassifiedinto2types.3.1.1Non-compactconductor3.1.2Compactconductor4.Sizes4.1Sizesanddetailsofcables

8、shallbeasgiveninTable1andTable2.-