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  1. danfo

    NEC Conductor de-rating

    Here's an NE Code question. It's based on a real world case. Invite your learned opinion or interpretation: Ladder type tray system. Mix of sizes, 600V 3 conductor 90 dC rated type TC cables. Tray fill ruled by Art. 392.9 (A) which refers to ampacity Table 310.16 Conductors terminate on 75...

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