Derating

[bennie]

According to the NEC under what conditions is it a requirement to connect a No.#10cu to a 20 amp breaker?

[ July 07, 2003, 10:53 PM: Message edited by: bennie ]

 

[pierre]

Re: Derating

Bennie

When thats all you have left in the truck.
When the helper brings you 10 awg (before color coding) instead of 12 awg. When the AHJ tells you to.

Pierre

 

[don_resqcapt19]

Re: Derating

There are no code sections that require a #10 conductor be conencted to a 20 amp overcurrent protective device. There are code sections that require that, under some conditions, the maximum OCPD for a #10 to be 20 amps or less.
Don