Any electricians available? Wire size question...

Bill Crowell said

View attachment 1715042075 if you want only 220 service you can get by with only 3 wires (you can omit the neutral)..

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Why anyone would do this over the price of one more wire does not make sense. It aways seems like a lot when the trench is dug, 2-10 years from now you forgot all aboout it