Latest Discussions : Electrical & Lighting


09:02PM | 06/16/04
Member Since: 08/21/03
17 lifetime posts
Ok, recently built new garage. When doing electrical, I ran a dedicated circuit to my compressor using 10/3. I never got a chance to hook it up prior to drywalling so I just capped it into a box. Now that I'm ready to hook it up, I looked at my compressor harness and found only 3 wires - a black, a white and a green.

Can anyone help me with the right wiring configuration??? I know the blacks go together. But what I'm kind of stumped on is the green and the white wire coming from the compressor.

What I was kind of thinking is that the white from the compressor goes to the other hot feed wire (red) and the green from the compressor goes to white neutral from the feed. But that leaves no ground to the compressor. Is this normal??




04:18AM | 06/17/04
Member Since: 06/09/04
16 lifetime posts
Are you sure the compressor is 220 volt and not a 110v.

if 220 the black and white on the compressor will go to the two hot feeds from the breaker box. The green will go to ground from the breaker box.

If you purchased 10/3 wire with a ground, (4 wires total) then you have wire for 3-phase electricity and just dis regard one of the wires and leave disconnected. You do not have a neutral wire in a 220 volt circuit.

I would caution you to verify voltage required on compressor before proceeding. Many units are dual voltage adn require wiring changes within the motor for 220 and come from the factory set up for 110v.


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