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NEC True or False Question: Receptacles

jar546

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True or False:
Receptacles rated at 20 amperes or less and designed for the direct connection of aluminum conductors must be marked CO/ALR, and if they are not CO/ALR type, they can be connected to an aluminum branch-circuit conductor using a copper pigtail with a wire connector
 
True, if the wire connector is rated for copper and aluminum together (which is its own story). The UL guide for receptacles (RTDV) says in part:

"Terminals of 15 and 20 A receptacles not marked ‘‘CO/ALR’’ are for use with copper and copper-clad aluminum conductors only. Terminals marked ‘‘CO/ALR’’ are for use with aluminum, copper and copper-clad aluminum conductors."

But this is more of a UL guide quiz than an NEC quiz.

Cheers, Wayne
 
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