WHATS THE DERATED AMPACITY OF (7)-10 AWG THHN COOPER CONDUCTORS IN A RACEWAY?

Question

Question

Answer 1

Answer #1

As per NEC Table 310.15 (B)(3)(a)

For 7 to 10 AWG conductors , derated ampacity is

70% of rated Ampacity for 7 to 9 conductors in raceway

50% of rated Ampacity for 10 conductors in raceway

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Answer 2

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