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Tuesday, June 1, 2021
Question:
Good Morning CQD,
How many number 12 THWN in one and half inch conduit?
Bruce Kozlowsky
A
Answer:
Hi Bruce,
The answer can be found in Table C.9 in Informative Annex C which indicated that (62) 12 THWN conductors is the maximum. Remember that there may be correction factors for number of current-carrying conductors in a single raceway, or temperature correction factors, which both have an impact on the ampacities of the contained conductors. See Section 310.15.