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How many AWG #12 THHN conductors are allowed in a 1" RMC nipple?

Answer :

Final answer:

According to National Electrical Code guidelines and considering the size of both the conduit and the wires, you can typically fit about 9 AWG #12 THHN conductors into a 1" RMC nipple. However, this can vary depending on additional factors.

Explanation:

The question asks about the maximum number of AWG #12 THHN conductors that can be fitted into a 1" RMC nipple. To determine this, we need to consider the National Electrical Code (NEC). According to NEC guidelines, the total area of all conductors should not be more than 40% of the interior cross-sectional area of the conduit. The conductor's size is crucial in determining how many wires you can safely insert without overheating or causing other potential safety issues.

AWG #12 THHN is approximately 0.0133 square inches. On the other hand, the interior area of a 1" RMC nipple is roughly 0.314 square inches. So, if you divide 0.314 by 0.0133, and then multiply by the 40% filling rule, you find out you can fit in about 9 AWG #12 THHN conductors. But remember that the exact number can vary depending on other factors, including the existence of other conductors inside the conduit and local code requirements.

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