St. Joseph, Champaign County, IL | You don’t know what you don’t know, if you think running a 60A breaker, on 10 gauge wire, to feed a 7.5 hp, single phase motor, is not acceptable!
For wiring motors, you first need to know what a motor is going to pull. OP says 29 amps.
With that amperage, you can size your wire, which most copper wire you’re going to encounter today will be rated at 40 amps. 40’ is nothing to be worried about as far as voltage loss.
Next you have to connect that wire to a breaker (or fused disconnect). For motors, the breaker is sized to the motor, NOT to the size of the wire. The breaker has to be able to handle the inrush current, which is the power (amperage) needed to start the motor turning from a dead stop. This inrush current is multiple times the amount of amps the motor will pull once running, but the inrush will most likely trip a breaker that is sized only to the full load amps of the motor.
The above information will pass a code inspection, done correctly. You need to become more familiar with the electrical code, and how motors are wired, before giving out YOUR BAD ADVICE!
Edit: BTW, Licensed as a Master Electrician, fully insured as an electrician, been working as an electrician since 1996, and have passed numerous electrical inspections involving motors being wired in the manner I describe above.
Edited by 45Deere9670 12/25/2020 07:59
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Electrical question on new air compressor
