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Old 11-02-2013, 08:21 PM   #1
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Connecting Garbage Disposal and Switch to Dishwasher Electrical


I'm trying to hook up a garbage disposal on a switch to my existing dishwasher. I have the white/black wires from the breaker connected to the white/black wires from the dishwasher. I tried connecting the black wire from the switch to the black wires of the dishwasher/breaker, the white wire from the switch to the black wire of the garbage disposal, and the white wire from the garbage disposal to the white wires from the breaker/dishwasher, but this isn't working. What am I doing wrong?

-- Christy




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Old 11-02-2013, 08:31 PM   #2
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Connecting Garbage Disposal and Switch to Dishwasher Electrical


Connect all of the white wires together. Connect a black wire from the breaker to one screw on the switch. Connect the black wire from the garbage disposal to the other screw on the switch.

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Old 11-02-2013, 08:42 PM   #3
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Connecting Garbage Disposal and Switch to Dishwasher Electrical


What is the amp rating of the disposal? What is the amp rating of the the dishwasher? What size circuit is feeding the existing dishwasher?
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Old 11-02-2013, 08:53 PM   #4
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Connecting Garbage Disposal and Switch to Dishwasher Electrical


No clue... It was working about 2 weeks ago, but something came lose and now I can't remember how to reconnect them.
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Old 11-02-2013, 08:56 PM   #5
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Connect all of the white wires together. Connect a black wire from the breaker to one screw on the switch. Connect the black wire from the garbage disposal to the other screw on the switch.
The black wire on the garbage disposal isn't long enough to reach the switch.

If I connected the black wire from the breaker to the switch what would happen to the black wire from the dishwasher... what would it be connected to?
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Old 11-02-2013, 09:12 PM   #6
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Connecting Garbage Disposal and Switch to Dishwasher Electrical


Anybody know how to get these annoying adds off the posts?
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Old 11-02-2013, 09:53 PM   #7
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Connecting Garbage Disposal and Switch to Dishwasher Electrical


The black wire from the breaker goes to both the switch and the dishwasher.

Where are you mounting the switch?
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Old 11-02-2013, 09:57 PM   #8
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The black wire from the breaker goes to both the switch and the dishwasher.

Where are you mounting the switch?
Under the sink.
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Old 11-03-2013, 07:59 AM   #9
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Connecting Garbage Disposal and Switch to Dishwasher Electrical


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Under the sink.
Do you have small children? There's a reason the switch is usually on the wall. I'm not sure why your dishwasher has a switch.
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Old 11-03-2013, 08:01 AM   #10
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Connecting Garbage Disposal and Switch to Dishwasher Electrical


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I'm not sure why your dishwasher has a switch.
A dishwasher is required to have a service disconnect.
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Old 11-03-2013, 09:31 AM   #11
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Connecting Garbage Disposal and Switch to Dishwasher Electrical


You should review Kbuz comment regarding size of circuit and amperage requirements of the disposal and dishwasher. My dishwasher draws about 10 amps. You can determine the amperage draw by reading the nameplate on the dishwasher. A typical disposal might draw 8 or 10 amps. If you run the disposal and the dishwasher on the same circuit, and you plan to be able to run both of them simultaneously, you need to feed them with a large enough circuit for the combined amperage of the two devices.

If you run both devices off the same switch, the switch must be rated for the combined amperage of the two devices. As for the location of the switch, in my town new dishwasher installations are required to be run through a visible switch, which is typically on the top of the counter, not below the counter. The idea I suppose is to allow someone working on the dishwasher to be able to positively cut off power to the dishwasher, and be able to verify that the power remains off during servicing. Why throwing the breaker is insufficient is beyond me, but you may have similar rules.
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Old 11-03-2013, 09:42 AM   #12
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Connecting Garbage Disposal and Switch to Dishwasher Electrical


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A dishwasher is required to have a service disconnect.
Is this only for when the dish washer is hard wired? Mine is connected via SO cord to an outlet under the sink. If I want to work on it.....I unplug the cord.
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Old 11-03-2013, 09:52 AM   #13
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Connecting Garbage Disposal and Switch to Dishwasher Electrical


It's not that it only applies to hardwired equipment, it's that the cord/plug connection, in itself, is the service disconnect. And IMO, is much better than a switch on the counter top.
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Old 11-03-2013, 09:55 AM   #14
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Connecting Garbage Disposal and Switch to Dishwasher Electrical


Oh, and I'm not trying to sound like Gregzoll here, but the 2014 will probably eliminate being able to cord/plug the dishwasher. The DW will have to be GFI protected and AFCI protected and the GFI will have to be in a "readily accessible" location. Some say (not me) that the sink base is not a readily accessible location.
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Old 11-03-2013, 10:12 AM   #15
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Connecting Garbage Disposal and Switch to Dishwasher Electrical


If that happens, it might be better to install a sub panel in the kitchen.

I can see it now....designer sub panels with your choice of wood, color and trim to match the cabinets

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