UL A- 工业控制板

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1、UL508A-1993工业控制板October12,19931SUBJECT508AOUTLINEOFINVESTIGATIONFORINDUSTRIALCONTROLPANELSIssueNumber:2OCTOBER,1993COPYRIGHT1993UNDERWRITERSLABORATORIESINC.??UL'sOutlinesofInvestigationarecopyrightedtoprotectUL'spublicationrights,nottorestrictth

2、eiruseinproductdesignorevaluation.SeeparagraphEoftheForeword.OCTOBER12,1993INDUSTRIALCONTROLPANELSSUBJECT508A3)CONTENTSFOREWORDINTRODUCTIONScope.........................................................................5General..............................

3、..........................................5PARTI-COMPONENTSUnrestrictedDevices..............................................................6RestrictedDevices................................................................6UnevaluatedDevices..............

4、................................................7Class2Transformers.............................................................7GroundFaultCircuitInterrupters.....................................................7PARTII-ENCLOSURECONSTRUCTIONEnclosureTypes

5、................................................................11ProtectionAgainstCorrosion.......................................................13EnclosureWithOpeningsforWiringSystems..........................................14Thickness................

6、.....................................................14HingedCoversandDoors.........................................................17PARTIII-ELECTRICALASSEMBLYGeneral.......................................................................20Spacings.......

7、...............................................................20FieldWiring....................................................................23Grounding.....................................................................25WireBendingSpace.............

8、................................................26InternalWiring..................................................................27MotorOverloadProtection.........................................................30M