"OldGuy" wrote in message
...
Welder is rated 240VAC 60Hz 20A single phase.
How to connect to house 220VAC 60Hz that is two phase 120VAC?
House is 20A.
220VAC coming from unused dryer connector.
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Your house dryer connection is still single phase but has a neutral if it
has four terminals. It will have a L1, a L2, a Neutral, and a Ground
terminal. You will want to connect the welder to the L1 and L2 terminals
(240 volts) and the Ground. Three wires total. Dryers usually use a 30 amp
connector so you will want to find the correct connector and use 30 amp
wiring into the welder. Some older dryer connections were just three wire
and used the ground as the center tap (for the 120 volt parts of the dryer).
That is the best I can tell you without seeing everything.