De rate ?

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Sparky2012

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Dc
Adding a new 42 circuit panel. I'm running (2) 1 1/4 emt to (2) j boxes for my receptacles Circuits. Can I use #12 thhn or 10 thhn? Would 1 1/4 emt size work?
 

Dennis Alwon

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Location
Chapel Hill, NC
Occupation
Retired Electrical Contractor
Yes you will have to derate. I would run 3/4" emt and put in a few full boats. Max that you can have in the conduit is 9 CCC before the de-rate factor will affect you with #12 wire 90C rated. Look at T.310.15(B)(3)(a) in the 2011
 
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