Alright I'm trying to put an air compressor motor on my grinder but I'm unsure on how to wire it. It has three wires and the power cord also has three wire. Black green and white. Any ideas? I should have kept the old switch that turned them on. Oh well.
Motor Wiring
- Thread starter Tomg303
- Start date
RCStocker
Well-known member
The black wire is the 110 hot. The white is the moter ground and the green is the back up ground.
When installing a switch of any kind the hot wire always goes through the switch. That would be the black wire. The white wire and green are both grounds but the withe it the ground that connects and conducts the circut back to the electric pannel, The green is a safty ground and if you are using metal boxes and conduit the box must be grounded with the green wire.
When connecting the common green ground in all boxes plastic or not they mus be crimped with a brass sleeve to meet code. You can use wire nuts on the other connections but the green wire must alays be crimped with the brass or copper sleve clip.
That is to say your motor is running off of 110v. 220 volt is just 2-110v lines. There are 2 110v leeds and post in your breaker box. The third is a ground then you have the little square steel rods with set screws. That is where you fasten your common green wires into.
You might need to rewire your motor and that should be on the inside of the plate cover or it will be on the circut board where the wire leads come form.
220 v takes less current to run.
When installing a switch of any kind the hot wire always goes through the switch. That would be the black wire. The white wire and green are both grounds but the withe it the ground that connects and conducts the circut back to the electric pannel, The green is a safty ground and if you are using metal boxes and conduit the box must be grounded with the green wire.
When connecting the common green ground in all boxes plastic or not they mus be crimped with a brass sleeve to meet code. You can use wire nuts on the other connections but the green wire must alays be crimped with the brass or copper sleve clip.
That is to say your motor is running off of 110v. 220 volt is just 2-110v lines. There are 2 110v leeds and post in your breaker box. The third is a ground then you have the little square steel rods with set screws. That is where you fasten your common green wires into.
You might need to rewire your motor and that should be on the inside of the plate cover or it will be on the circut board where the wire leads come form.
220 v takes less current to run.
Outlawmws
Well-known member
What does the motor plate say the motor is? 120V or 220?
In a 120V motor black is the line voltage, white is the neutral return (NOT ground....
), and Green is ground.
If your motor is in fact 120V. Get a box and add a switch on the black line ONLY. That way if there is a short, turning it off disconnects it.
In a 120V motor black is the line voltage, white is the neutral return (NOT ground....
), and Green is ground.If your motor is in fact 120V. Get a box and add a switch on the black line ONLY. That way if there is a short, turning it off disconnects it.
Outlawmws
Well-known member
Pics are needed here...
Alchymist
Well-known member
So when did all this change?
GeneralDisorder
Well-known member
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- Sep 20, 2012
- Messages
- 306
Zoiks! I would just scrap the idea of using that to run anything. Yes it needs the fan to cool itself but the fan won't work properly without its housing to direct airflow - and do you really want to grind on metal with open motor windings like that? Hot sparks can melt the winding insulation.... Just toss that in the metal recycle.
GD
GD
Outlawmws
Well-known member
Why is the compressor still on there? That would be the end you would use if this was a viable alternative, but I agree, an open motor like that one is not a good candidate.
GeneralDisorder
Well-known member
- Joined
- Sep 20, 2012
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- 306
The compressor housing is cast into the motor end bell.
GD
GD