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Answer for USA, Canada and countries running a 60 Hz power supply service.Ask your Home Insurance Company if it will cover an electrical fire caused by improper wiring done by the homeowner. (It never ceases to amaze me that Electricians are the last to be called, after Plumbers, Roofers, Painters, etc to solve a problem!)

Asking this type of question usually means you aren't ready to do this yourself.

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

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(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 ...and you obviously don't have enough experience to do this safely!

Electricity is dangerous!

You can be injured or killed!

Call an electrician!

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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.

If you do this work yourself, always turn off the power

at the breaker box/fuse panel BEFORE you attempt to do any work AND

always use an electrician's test meter having metal-tipped probes

(not a simple proximity voltage indicator)

to insure the circuit is, in fact, de-energized.

IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS

WORK SAFELY AND COMPETENTLY

REFER THIS WORK TO QUALIFIED PROFESSIONALS.

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Q: If you have a 2-prong 240V outlet and only 2 wires and every wire is connected to two separate 20A breakers how can you replace it for one 120V outlet without rewiring?
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