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  #1  
Old 04-04-2006, 04:40 AM
Joe Walters Joe Walters is offline
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220V motor wiring

I've got a 110/220 motor currently wired for 110, and I want to switch it over to 220. The wiring diagram shows 2 leads incoming and the rest of the wires inside the motor are bundled and taped in a specific configuration.

Are the 2 leads both hot legs? Where should the neutral leg be connected, and what about the ground? Are the 2 hot legs twisted together to form one lead and the other lead neutral?

My outlet is one of the newer 4 prong 220 volt outlets, i.e., designed so that appliances with 115 and 220 volt functions can be safely grounded and run, and has the nema designation 14-50r

I've wired plenty of 110 motors, a salt-pot on 240, but never a high voltage motor. Any help would be greatly appreciated, trying not to fry my motor!

Thanks in advance!

Last edited by Joe Walters; 04-04-2006 at 04:43 AM.
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Old 04-04-2006, 06:56 AM
Charles Vestal Charles Vestal is offline
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Hello Joe;

The two leads in the motor will hook-up to the phase or hot wires from your supply.
The ground wire will hook to the chassis of the motor, there should be a green screw on the motor to hook up to.
You will not need to hook up the neutral from your supply.

Charles
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Old 04-04-2006, 08:33 AM
Jamey Saunders's Avatar
Jamey Saunders Jamey Saunders is offline
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Charles is right, Joe. When you connect either of the hot leads and the neutral, you get 110v (half-voltage). When you use the two hot leads, you get 220v (full voltage). It doesn't matter which lead coming out of the motor goes to which hot lead.

Absolutely connect the ground, though.


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Old 04-04-2006, 02:14 PM
Joe Walters Joe Walters is offline
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I'm up and running and there's no bog on my grinder now Everything's properly grounded and running like a top. Thank you!
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