In article ,
HerHusband wrote:

If you have balanced loads (i.e. two matching griddles), you could combine
a couple of circuits with a single 12/3 cable, sharing the neutral line.
Just make sure the two hot wires are on opposite legs of the incoming 240V
supply. This would reduce your cable runs somewhat, and is frequently done
for similar situations like kitchen wiring.
Actually, he wouldn't even need balanced loads. Using an Edison circuit
like that and breaking the brass tab on the duplex outlets would give
him some nice duplexes where he could draw 20 amps from both the top and
bottom outlets of a duplex.