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Posted By: akmaster Derating length requirements - 09/24/19 08:26 PM
If I have a j box in the basement where all branch circuits end..and need to extend four feet through foundation to panel

Is there a derating requirement from the j box to the panel based on length?
Posted By: gfretwell Re: Derating length requirements - 09/25/19 04:54 AM
24" of grouped conductors starts kicking off derating. In #12 and #14 using 90c conductors you are usually not in trouble until you get 9 in a pipe.
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