05:48PM | 10/02/03
Member Since: 09/30/03
2 lifetime posts
Greetings. My question: I have purchased a 240 volt shop air compressor. I had a 220 socket installed last year when the house and garage were remodeled. Can I install a plug on the compressor and plug it in, or do I have to remove the wall socket and hard wire the air compressor?

Any suggestions would be of great help.

Thanks! CEA


08:35PM | 10/02/03
Member Since: 05/11/03
64 lifetime posts
Yes you should be able to plug it in if it is a standard 240v outlet (2 hot wires and a ground wire)and the proper ampacity. You should not for example plug in a small compressor (like a 1/2 horse) to a 50 amp 240v outlet. The problem is the circuit would never trip if the motor is overloaded. If you don't follow this please call a professional to look at it and make sure it is safe. Mr. Electric

Tom O

03:17PM | 10/03/03
Member Since: 09/17/02
487 lifetime posts
Generally speaking, if your compressor was meant to be plugged in, it would have come with a cord & plug.

If you use a cord & plug as the required disconnecting means, the receptacle & plug will need to be horsepower rated. There are no listed plugs that I could find that are rated for more than 3 horsepower at 240 volts single phase. So if you have a 5 hp compressor, you'll need to hardwire it & have a suitable disconnect switch.

Also, there is a relationship between the size of the circuit breaker feeding this motor and the size of the motor. Best to have a professional verify that you have the correct size wire & circuit breaker for this installation.

[This message has been edited by Tom O (edited October 03, 2003).]



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