Common Neutral & Ground

[MiamiNEC]

Is it a code violation to have the garbage disposal and the dishwasher fed from a 4 wire feeder, with a common ground and neutral? They are each on their own breaker? All are #12 AWG. The 4 wire feeder is connected to dual receptacle box under the kitchen sink.

 

[electricmanscott]

Re: Common Neutral & Ground

I'll let someone else spell out the details but if done correctly, no this is not a problem or a violation.

 

[james wuebker]

Re: Common Neutral & Ground

MiamiNEC
Just make sure you have your hot wires on different phases.
Jim

 

[MiamiNEC]

Re: Common Neutral & Ground

James W
Why on different phases? Is it so that the neutral is balanced? What would happen if you didn't. Thanks

 

[al hildenbrand]

Re: Common Neutral & Ground

If the breakers are on the same phase, the neutral currents from each appliance will add together. Depending upon the load connected, the neutral current can sum to double the current on the phase legs.

I note:

The 4 wire feeder is connected to dual receptacle box under the kitchen sink.

If, by dual receptacle, you mean two receptacles on one device yoke, then take a read of 210.7(B).

The overcurrent protection must have handle ties, or be a dual trip breaker.