ScottG wrote:
Lots of good info.
While the NEC doesn't adress the use of both the 20 and 30A receptacles in a panel, that doesn't mean it isn't perfectly fine to do so.
If your using what is commonly referred to as a 100A panel with one each 50A, 30A & 20A outlets, the 20A and 30A outlets are *wired (by the manufacturers of the box) on oposite sides of the 240V circuits. So they don't both run off the same side of the 50A.
This makes it perfectly safe to use both circuits at their max potential. That is UNLESS the 50A is also in use. Then all bets are off. The NEC rates the panel based on use of the 50A. So you can skip that part and use the 20/30 with no issues.
So the bottom linie is, it is perfeclty safe to use the 20/30 at the same time as long as the 50 isn't in use.
*Connection not actually made with wire but rather with solid metal, formed bars.
Darn, I actually had an edit typed up about using 30 + 20 amps on a 30/50 amp pedestal and not sure where it went.
Yes, if you're at a 30/50 amp pedestal you should be perfectly fine unless there is an issue of some sort with the CG wiring system.
