I thought the NEC did not allow us to reduce the neutral on the smaller (15, 20, 30-amp) circuits? Or, am I confusing the ground with the neutral here?
This is what I’ve always thought as well. I believe we were even taught this in class many years ago. This thread has got me wondering though, since I also don’t see what would prevent someone from pulling a #12 THHN and a #14 THHN in a raceway, then terminating them on a device or equipment with 60 or 75-degree C lugs and proclaiming it as a 20A/120V circuit.
If I had seen someone doing this on a job, I would have said that it’s not allowed, but now I can’t actually find where it would be prohibited.
