Conversion from 120V to 240V

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  #1  
Old 02-20-05, 08:56 AM
JAW
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Conversion from 120V to 240V

My brother is looking to replace his 120V washer/dryer stack with a 240V version. The circuit is now 2 wire romex, any issues so long as the new unit is three wire 240V?
 

Last edited by JAW; 02-20-05 at 08:57 AM. Reason: Email notification
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  #2  
Old 02-20-05, 09:54 AM
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No can do with the existing wiring.

A 120 volt device would be a 20 amp circuit, utilizing 12-2.

A 240 volt unit would be a larger circuit, requiring larger wire AND more importantly 1 three wire circuit.

You will have to run a new 3 wire (plus ground) circuit for this.
 
  #3  
Old 02-20-05, 06:52 PM
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I would have said "maybe" rather than "no". It depends on the electrical specifications of the existing circuit, and the electrical specifications of your new unit. Like always, the devil is in the details.
 
  #4  
Old 02-21-05, 05:45 AM
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My reasoning for saying no is because of the statement "The circuit is now 2 wire romex".

While I have never bought a 240 volt combination unit, I am almost certain that a neutral wire would be required. Perhaps I am wrong, and perhaps this unit has wiring directions for a 3 wire (and not 4 wire) circuit, but then I would think there would be the questionable issue of converting a receptacle from 120 to 240 volts when no neutral is (or can be) present.

This does not even mention the wire size, which may also be an issue.
 
  #5  
Old 02-21-05, 07:19 AM
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There do exist combo units which require no 120, and thus would require no neutral. We don't have enough information to know whether or not that is the type of unit we are discussing here.
 
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