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for USA, Canada and countries running a 60 Hz power supply service.Running single conductor wire with two-wire cable for a three-way switch is illegal.

(LIFE SAFETY WARNING! [disclaimer]

Electricity is dangerous!

You can be injured or killed!

Improper installations can cause fire, injury and death!

Should you be doing this yourself?)

This is one of those questions - if you know this little, you shouldn't be doing what you are planning...

No disrespect intended, but this is SO basic that it suggests you have not studied the subject at all!

The practice of running an additional conductor along with the cable to give you enough wires for a three way is illegal and unsafe.

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Install three conductor cable with ground.

For information on how to hook-up one light with two on-off switches, see the Related link "How to wire a 3-way switch, including a wiring diagram", shown below.

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By asking this question you are probably not quite ready to take on this particular task. The correct answer to your question will depend on the exact locations of the switches and the switched fixture, its voltage and its power rating.

If you get any other answer here, you might attempt to do something you shouldn't be doing, and that may cost someone a shock, a home fire, or even their life.

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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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8y ago
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Wiki User

13y ago

You need three wires and ground between switches and a pair for supply and one for load. Google 3-way switch wiring for a diagram.

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Q: Can you use a 2-wire romex to hook up 3-way switches?
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