Redsy,
this is the closest pix i can find of a 'quad';
[Linked Image from ais.siemens.ca]
the one's with the integral handel ties are used in mobil homes with the 12 cir cans, 30A & 20A respectively.
I don't know about your poco, but off peak here is strictly hot h2o, they really get po'ed if anything else is run off of the dedicated meter.
Besides that, it's timed ( at least here), so dryer detail would need to follow suit....
[Linked Image]