UL 1721

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UL 1721

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    APPLIANCE WIRING MATERIAL
    Subj.758 Section 1 Page 1721 Issued:1977-07-18
    Revised:2011-07-29
    Style 1721 Single Conductor with Extruded Insulation and Covering

    Rating80 deg C, 30 Vac, Horizontal flame
    ConductorMinimum 40 AWG
    InsulationTFE, FEP, PVDF or ETFE, 3 mils minimum thickness at any point, 40 mils maximum thickness at any point. The insulation may be applied directly over the conductor or applied as a spiral wrapped TFE, PFA, FEP, PVDF or ETFE thread with 5 mils minimum thickness at any point, 40 mils maximum thickness at any point and enclosed with "tubed on" insulation.
    ShieldOptional.
    CoveringInner covering - Optional. Extruded PVC, XLPVC, nylon, TFE, FEP PVDF, ETFE or laquered braid, 2 mils minimum thickness at any point, or 0.5 mils or heavier polyester film. Required over metal faced polyester tape shield. Outer covering - Only optional over braided metal shield. Extruded PVC XLPVC, nylon, FEP, PVDF, ETFE or lacquered braid, 2 mils minimum thickness at any point.
    StandardAppliance Wiring Material UL 758.
    MarkingGeneral.
    UseInternal wiring of Class 2 circuits in Electronic Equipment.

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