A compressor that size needs the motor set for 220 volts and 220 volt
service plumbed to it to drive it. Even if it has a 120 volt setting,
its foolish to run a motor that big on it. My craftsman in my garage is
220 volt. I had to run a special line out there to do it. I just stole
unused dryer AC feed and rewired it.
On Jan 30, 2:19 pm, email@example.com wrote:
A single phase 5 HP motor at 115VAC draws 56 Amps. A single phase 5
HP motor at 230VAC draws 28 Amps. A five horsepower compressor is
huge. Most garage 110VAC circuits are 20 amps at best. 230VAC
circuits are usually 30.
You're all forgetting the funny way they rate horsepower on compressor
motors. A "5 HP" motor might really be 2 HP or less.
My current 6 HP compressor runs on a 20A 240V breaker, and it doesn't
put out as much air as the ancient 1.5 HP compressor that it replaced
when the old one finally bit the dust.
I've got a THREE QUARTER horse motor that is probably 45 years old, runs
fine on a 15 a circuit, and is probably 2 1/2 times the diameter of these so
called modern 5 horse motors. It runs my compressor all day continuously
and will still be cool to the touch. (In cool weather that is, it's outside)
They've really fouled up the electric motor horsepower ratings. I'd like to
see one of these yuppifed motors on a motor dyno.
"zxcvbob" < firstname.lastname@example.org> wrote in message
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