^^ nevermind that last response. I noticed my original question was regarding panels, not wire runs!!!

Thanks twh!

I got an interesting one for you. It is tricky.

I gotta look it up from my notes.

Here it is....

if I have 2500 WATTS heater and 240 VOLTS. I'd like to size the conductors.

do I go about it as such:

2500 / 120 = 20.833

So, here's the part that is tricky ( to me )

Do I need to pad that wire by x 1.25 for continuous load?

If so, I get 26AMP, and it's an easy #10 AWG answer from Table 2. However, if not, I'm left with 20.8A. That means, in T2 for conductor size, I would have to pick #10 since it is over 20. BUT..... SEC 8-106(1) states that if the next smaller size conductor has not more than 5% less than this minimum, the smaller size is permitted. Since 5% of 20 would be 1, and this falling at 20.8, does that mean I can use #12 ??

Or, am I totally misunderstanding 8-106(1) rule?