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How do you install a 240V 20A breaker and receptacle with 1 hot 1 neutral and 1 ground when there are 2 hot wires and 1 neutral?

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2015-07-15 19:08:47
2015-07-15 19:08:47
for USA, Canada and countries running a 60 Hz power supply service.The receptacle you are trying to use is the wrong one in this application. There are 2 different types of receptacles for 240 volts: "2 hot,1 ground" and "2 hot, 1 neutral, 1 ground". Please get a professional to help you with this.

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As always, if you are in doubt about what to do, the best advice anyone should give you is to call a licensed electrician to advise what work is needed.

Before you do any work yourself,

on electrical circuits, equipment or appliances,

always use a test meter to ensure the circuit is, in fact, de-energized.

IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOB

SAFELY AND COMPETENTLY

REFER THIS WORK TO QUALIFIED PROFESSIONALS.

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Assuming there is no neutral: 1) Turn off the breaker. 2) Disconnect 1 of the 2 hot wires from the breaker and connect it to the neutral bar (Recommend phase taping the wire white :) ) Remember which wire you used as the neutral, in a home you will most likely have a black and a red. I would keep the black hot, and phase tape the red wire white. If it's not long enough you can wire nut another white wire onto it to make it reach the neutral bar. 3) Leave the breaker OFF, at the receptacle, change it to a 120 volt receptacle. Take the wire you made the neutral, and connect it to the white screw on the 120 v receptacle, and take the black to the hot. Ground to the ground screw. Make sure you phase tape the red wire at the receptacle white as well. 4) turn the breaker on 5) test the receptacle with a meter or receptacle testing device for correct wiring.

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Simple. The branch circuit you're feeding with the breaker should have a black, (hot), a white (neutral), and a bare ground wire. The bare ground gets screwed under the ground bar with the other grounds. The black wire goes under the appropriate screw on the breaker. Also the neutral goes to the breaker under the screw with a white dot by it. Then the curled up white wire attached to the breaker gets screwed into the neutral bar where all the other white wires are.

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Run a fused power line from the receptacle to either the battery for constant Hot or to the fuse box for an ignition controlled receptacle and ground the receptacle either by mounting on a metal surface or run a ground wire from the body of the receptacle to a good chasis ground

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An old 2 hole receptacle can be changed to a 3 hole receptacle that will accept a 3 prong plug, provided a ground wire is available at the box and connected to the ground (green) lug on the new receptacle. A 2 hole receptacle has a hot and neutral wire, while a 3 hole receptacle will require a ground wire connection -- in addition to the hot and neutral wires.


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