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UL spec for temporary equipment for NEC 520 & 525

UL spec for temporary equipment for NEC 520 & 525

UL spec for temporary equipment for NEC 520 & 525

(OP)
I've been designing switchboards and switchgear to UL891 & UL1558.  I have a customer that is requesting cam-loc type connectors mounted on the outside of the enclosure. These are clearly not allowed under 891 or 1558.
Does anyone know of a UL spec that covers portable and/or temporary equipment as described in NEC 520 & 525 ?

  Thanks

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