10:42AM | 10/26/06
Member Since: 10/25/06
2 lifetime posts
I have a 220 volt compressor that I'm attaching a power cord to. My question is when attaching a power cord to the compressor,(sanborn) red and black wires to power supply, white and green to neutral and ground? Plug is a 220 volt(like on a stove) 2 110 leads and neutral. Green goes to ground rod. Is this correct? Is it OK to have a neutral and a ground? (They both go to the same place in the box) Any kind of diagram would be appreciated. Thanks,ws6dad


11:01AM | 10/27/06
Member Since: 04/25/05
1915 lifetime posts
On a unit that only requires 240 and not 240/120 the neutral is not used.

If you are using a NEMA 14-50R (stove receptacle) then you need to run the neutral wire to the receptacle, although it won't be used for this application.

Or you can use the 6-50R and not run the neutral.

On the plug you can use a 3-wire cable and if you use the 14-50P, just not connect the neutral. And put black or red tape or paint on the white wire to indicate that it is being used as a hot.

If you have a 4 wire cable then go ahead and hook up all of the wires on the plug. But at the compressor don't just wire nut it off.

The neutral conductor should never be connected to the ground, except at the service disconnect. That might be at the main panel or in some home there is a separate disconnect outside the house.

The EGC (ground wire) should connect to a place on the compressor that is indicated by a green screw that goes into the metal case or a terminal with a ground symbol stamped in the metal by it.


08:49AM | 10/28/06
Member Since: 10/25/06
2 lifetime posts
Thanks, this was just the information I was looking for! THANKS!


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