Nine #12 AWG copper conductors are run in a conduit. Each conductor has THHN insulation, and the ambient air temperature is 118°F. How much current is each conductor permitted to carry? A) 17.2A B) 30A C) 24.6A D) 21A
Added by Thomas R.
Step 1
- According to the National Electrical Code (NEC) Table 310.15(B)(16), the base ampacity for a #12 AWG copper conductor with THHN insulation is 30 amperes when not adjusted for temperature or conductor bundling. Show more…
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