09:58AM | 03/11/03
Member Since: 03/10/03
2 lifetime posts
I'm trying, unsuccessfully, to figure out the logic my electrical contractor used during the wiring rough-in for the kitchen.

He used 14-3 cable to bring power to a double-gang j-box; the red and black conductors are each connected to a separate 15-amp breaker at the service panel. One breaker is marked for the disposer.

From this j-box, he ran 14-3 cable to the dedicated disposer outlet. The black conductor is hot. Was there a special purpose for using 3-conductor cable at this location? If so, what should the box dressing look like?

Thanks in advance for any and all advice.


05:43PM | 03/11/03
Member Since: 11/18/02
30 lifetime posts
The disposer needs a switch. In mine, two-wires from a j-box come into the disposer switch box. The disposer wiring comes into this same box.

Not sure how/why a three-wire is needed.


03:45AM | 03/12/03
Member Since: 09/17/02
527 lifetime posts
He probably did you a big favor. That 3rd wire can be used to power you dishwasher. It is a multiwire circuit. The white neutral is shared between the black and red wires.


02:37PM | 03/12/03
Member Since: 11/18/02
30 lifetime posts
I assumed the red wire going into the double j-box may have been for the dishwasher.
But I still don't know the purpose of the red wire going from the double j-box to the "dedicated disposer" box, if I understood it correctly?


02:59PM | 03/13/03
Member Since: 11/05/01
101 lifetime posts
What type of disposal? Is there a wall switch or is it a batch feed?


03:11PM | 03/13/03
Member Since: 03/10/03
2 lifetime posts
Thanks, everyone, for your replies. The j-box I refered to is intended for the disposer switch. My dishwasher circuit is wired separately. This means that I still can't understand why the disposer outlet is wired with 3-conductor cable. It could be for a split outlet, with one side switched. Or, perhaps the electrician was simply using a convenient piece of cable.


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