Re: O/T electrical question

Posted by John T on September 20, 2006 at 18:14:51 from (66.244.90.5):

In Reply to: O/T electrical question posted by 37 chief on September 20, 2006 at 16:57:57:

Chief, What you need is at least two but preferably three seperate branch circuits fed from your main panelboard, one for each appliance (or 1 circuit for dryer and 1 circuit for the freezer plus washer, but still subject to the actual load currents and local NEC authority, see below)

For a typical 240 volt dryer branch circuit, you would need to use a 2 pole 30 amp 240 volt circuit breaker at the panel and run 10/3 wire (2 hots and one equipment ground) to the 240 volt 30 amp 3 pole dryer receptacle.

A freezer (failry decent load) ought to have its own 120 volt 20 amp branch circuit, which requires a 120 volt 20 amp single pole circuit breaker in the panel and use 12/3 (1 Black Hot, 1 White Neutral, 1 Green or Bare Equipment ground) wire to a standard 120 volt 20 amp NEMA 20R duplex receptacle.

A washing machine uses the same as above, its a 120 volt 20 amp branch circuit with 12/3 wire (1 hot, 1 neutral, 1 ground) serving a 120 volt typical household NEMA 20R duplex receptacle.

NOTE It may be possible (depends on actual full load currents of the appliances and local NEC authority) to use a single 20 amp branch circuit to feed BOTH the freezer and washing machine, it would use the same 1 pole 20 amp 120 volt circuit breaker in the panel and use 12/3 wire (1 black hot, 1 white neutral, 1 bare/green equipment ground) but just have a receptacle for each appliance (i.e. 2 receptacles on the single common branch circuit) or even a single duplex receptacle if the appliances were side by side.

HOWEVER I would prefer a freezer to be served by its own dedicated 20 amp 120 volt branch circuit with nooooooo other receptacles or loads on that circuit, plus the load sizes or the NEC may require the freezer to be on its own circuit regardless. Thats how Id do it personally

Best wishes,

John T Retired Electrical Engineer

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