A 7.5 motor 220/3p will run all day on a 30 amp circuit, which only requires
10 gauge wiring. Matter of fact I recently wired a 7.5hp 3450 ventilator fan
for a truck garage.

Tony


"Greg Deputy" wrote in message
news
I've got a new (to me) lathe coming in. It has a 7.5 hp motor, 3 phase.
I've got a 10hp phase converter for it, and in the process of having a
circuit added. What I dont know, though, is what size circuit should I
have
installed for this? 50 amps? more? Less?

I'm sure this is a basic question, but i'm not an electrician. Thanks for
any info.