Originally Posted by scotzz
roger1..............the specs for the welder say the power cord is a "50A, 250V, Three Prong Plug (NEMA Type 6-50P)." Input is 20A with a recommended fuse or breaker size of "40A Super Lag." Sounds confusing to me.
It is telling you to wire the feeder with a 40 amp circuit at a minimum. A super lag is one type of fuse that is able to withstand higher than normal inrush currents. Circuit breakers normally withstand momentary high inrush currents.
If I were you, I would give up on the shared circuit idea and wire in a separate circuit.