Max THHN strands in ENT


Old 01-09-10, 09:24 AM
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Max THHN strands in ENT

Hello, can anyone tell me how many 12ga strands can be run in ENT? I have a complex electrical system (whole house generator, room circuits on UPS) and would like to run ENT to areas of the house where a lot of circuits are needed. For example, my kitchen will need a 30A circuit for dishwasher/disposal/pou water heater, two 20a gfci receptacle circuits, and a 20a gfci microwave circuit. Due to the gfcis (gfci breakers), I will need to make neutral home runs, but would also like to make ground homeruns. Instead of making 3 12/2 runs and a 10/2 run with NM I would prefer to make one 1" ENT run from the man panel to the kitchen and then breakout to NM from there. For the kitchen I count 9 12ga wires and 3 10ga wires. Is this possible using 1" ENT?
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Old 01-09-10, 09:29 AM
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Using your plan you would need to apply derating factors from having so many current carrying conductors in the same raceway. This would mean that you would need to install larger conductors to account for the reduced ampacity.

Perhaps a better plan would be to install a small subpanel and run your circuits from it.
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