Might be. Might not be. You didn't provide enough information to tell.
There's a NEMA plug and receptacle configuration chart at
which should enable you to tell what you have.
Doug Miller (alphageek at milmac dot com)
The best way to tell is by looking at the plate on the motor. Though,
the plug may or not be the correct plug for the type of power required
and could have worked for a variety of reasons, including the fact that
someone took an inappropriate plug and receptacle and jerry rigged the
wiring to make it all work.
But it could also be a "NEMA 5-20P" 20 amp plug, which has the
opposite blades at right angles, and for the same reason.
Doug's right, the answer to what SHOULD be there is on the motor
plate. But I would also point out that if it's a convertible
(120/240V) motor, I would look in the junction box on the motor to see
which it's wired for.
Does it have a center prong in addition to the flat prongs?
Looking at it on-end, if it looks like this it is 220:
If it looks like this but is the same size as a regular 120V plug, it
is for a 20 amp 120 V circuit:
Of course, if this is a used machine that you have no prior experience
with, it would be best to check the motor for the proper voltage.
No dumb questions, just dumb answers.
Larry Wasserman - Baltimore, Maryland - firstname.lastname@example.org
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