Determine the ampacity of a No. 12 AWG copper conductor with THHN insulation that will be used

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Determine the ampacity of a No. 12 AWG copper conductor with THHN insulation that will be used in a 277 V, two-wire circuit in an environment with an average ambient air temperature of no greater than 86°F (30°C). Neglect temperature and bundling correction factors.

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