pbs wrote:
Hi:
Can #12 THHN be run through 1' gray PVC Electrical conduit?

If Yes, what is the code fill rate for 1" PVC? ( I believe that 1" EMT
can handle 18 #12 THHN maximum.)

Thanks


Actually One inch Electro Metallic Tubing has a table fill of 26 Number
12 American Wire Gage (AWG) conductors. Schedule 40 PVC is allowed 25
conductors. The question then becomes why. With more than 20
conductors in the raceway the ampacity of #12 THHN is 13.5 amperes. so
#12 could not be used for even a fifteen ampere circuit. You're allowed
fifteen #10 AWG wires in 1" PVC and at an allowable ampacity of twenty
amperes for 10 to 20 conductors you could use them for twenty ampere
circuits.
--
Tom Horne

"This alternating current stuff is just a fad. It is much too dangerous
for general use." Thomas Alva Edison