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  1. jlt72

    Control Panel Requirements: UL508A & NFPA 79

    NEC articles 90.7 and 110.3 make it clear that electrical equipment must be "suitable," and the best way to indicate suitability of a control panel is via third-party listing. In the US, that typically means UL508A listing. As I read Article 409, UL508A listing isn't explicitly required. It's...
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