L6-20P -> L6-30R
jra at baylink.com
Thu Mar 20 03:00:05 UTC 2014
----- Original Message -----
> From: "Seth Mattinen" <sethm at rollernet.us>
> On 3/19/14, 10:21, Jay Ashworth wrote:
> > It is exactly that: no one says you*can't* wire a 20A branch circuit
> > with #10.
> > It is even*possible*, though unlikely, that if you did so, you wouldn't
> > have to derate it to 80%. I would have to reread the Code to be sure.
> Well, I'd say it's pretty likely. However highly unlikely to be
> code-worthy of slapping on a 30A breaker in place of a 20.
Well, the situation were were discussing was replacing
30A CB <--> 10 AWG <--> L6-30
20A CB <--> 10 AWG <--> L6-20
and as I was reminded, you'd still have to derate that unless the
CB was magnetic. And you can't leave the breaker at 30, cause then the
attached 20A single device isn't protected properly by it.
So I was worng on the derating.
Jay R. Ashworth Baylink jra at baylink.com
Designer The Things I Think RFC 2100
Ashworth & Associates http://www.bcp38.info 2000 Land Rover DII
St Petersburg FL USA BCP38: Ask For It By Name! +1 727 647 1274
More information about the NANOG