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5 4 Raceway Sizing -- Annex C Note 1 to Chapter 9 Tables

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    5 4 Raceway Sizing -- Annex C Note 1 to Chapter 9 Tables


    #2
    The original PV wire was only 1000V. That is still better than the RHH stuff because there is no UL standard for a 1000V rating for that wire type.
    It was only later that PV wire rated at 2000V was introduced. It is larger and costs more. And the test for 2000V rating may not even have been available initially when PV was first introduced for all I know.

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