Power supply wiring to pressure switch

by Greg
(Seattle, Wa USA)


I have a speedaire 4B233E that is missing it’s power cord - it is wired from the pressure switch to the motor , but I don’t see terminals marked for black+, or white wires for power in?

Comments for Power supply wiring to pressure switch

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May 24, 2018
speedaire 4B233E wiring
by: ICS

It really doesn't matter with 120V. One is always hot and 1 is always a common.

Usually the motor has a black and a white wire and I match colors, but if you have 2 blacks or any other color, it doesn't matter.

Just know that green is always grounded to the metal part of the switch. They usually have screws on it for ground.

May 24, 2018
switch wiring
by: Doug in s.d.ca

That appears to be incorrect even for the motor, but I can't really tell from the pic.

Usually the "low" level is for the line cord, and the "upper" level for the motor.

Take a look here, and see if it helps:

https://www.about-air-compressors.com/campbell-hausfeld-65-hp-air-compressor-motor-connection.html

Good luck.

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