wrote in message
oups.com...
If I want to run an appliance that needs 50 amps, is there any problem
with combining two 30-amp circuits of approximately the same length, as
long as the part that carries the full current is using properly-sized
cable? It seems like the circuit would have a 60 amp capacity.

No it won't. You have to de-rate the cables some if they are close, in a
conduit, or, IIRC, run in parallel. The code book will tell you by how much.

N