I like to do things right and if I don't know something I like to find the answer in writeing but, I can find in writing that over 3 conductors in a conduit must be derated in current capacity. I also have a reference that says you can put, for one example, up to 12 #14 conductors in 1/2" EMT. So in residential single family house wireing, how many #14 and #12 THHN wires can I pull in 1/2" and 3/4" EMT and meet NEC code? Assuming half the wires are hot and half are white neutrals.
- posted
20 years ago