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Joined: Jan 2004
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What's wrong with using a three way switch (SPDT) for switching between the disposal and the dishwasher? I'm saving the cost of a circuit and breaker. Need code reference.
George Little
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Why use the switch?
How much do these units draw?
Bob Badger Construction & Maintenance Electrician Massachusetts
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Should have provided more details. You run a single circuit, probably 14/2 to a 3 way switch located above the kitchen counter for controling a duplex receptacle below the counter where you have the disposal and dishwasher plugged in. You run a 14/3 cable from the switch to the receptacle and break the tab off separating the two halves of the duplex. Now when you toggle the 3 way switch you will be providing power alternately- Switch up- disposal runs, switch down dishwasher runs. Saved the cost of a circuit and breaker.
George Little
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Joined: Oct 2001
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Bob I believe George uses the switch as an electrical interlock. When the switch is up the disposer is on, and when down the dishwasher is powered. I guess i need to type faster.
[This message has been edited by watthead (edited 11-14-2004).]
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I know and I do not know any code reason why you could not do this.
Also I asked why use the switch because if the GD draws 3 amps and the DW 13 amps one 20 amp circuit could be used as long as no other outlets where included on that circuit.
Bob
Bob Badger Construction & Maintenance Electrician Massachusetts
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Not sure if this is legal or not but we have something like this in the jail where I work.
The light switch for the room lights and the night lights is a three way. Up = room lights on night lights off. Down = room lights off night lights on.
At least with this method they will not forget to turn on the night lights.
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Joined: Oct 2001
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Another variation where George's setup has benefit is putting a small instant hotwater heater on the same circuit as a garbage disposal.
One outfit markets an air switch for the control of the disposal that does exactly the same thing that George's 3-way does.
But I have to wonder about the dishwasher purely from the manufacturer's perspective. Solid state controls are appearing on more and more dishwashers. A power interruption will re-initialize the control chips. The older mechanical clock would just pick up where it lost power.
Al Hildenbrand
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I don't know of any code violation, but it seems a poor design, IMO. I'd personally prefer a 20-amp circuit running to the dishwasher and disposer switch, leaving the dishwasher with unswitched power.
Dave
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Joined: Mar 2004
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I guess it would work fine that way.The question is why?With that set up,you can't run the disposal and dishwasher at the same time.I would run two circuits myself,a 12/3 would work nice.Better job that way I feel.A single 20 amp circuit would work too if a circuit needed to be saved.
[This message has been edited by andyp95 (edited 11-14-2004).]
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Not to be the bearer of bad news... Is the DW supplied with a factory cordset?? If not, does the mfg instructions say that a cord/plug connection is allowed??
References to NEC Article 400 prohibiting cord from replacing permanent wiring methods.
John
John
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