Can the garbage disposal and dishwasher, each with its own GFCI receptacle, share the same 20 amp circuit at the main electrical panel?

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    Depends. What are the requirements of your disposal and dishwasher? – isherwood May 23 '19 at 17:12
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    If they can share, then you may want to consider wiring dishwasher (regular receptacle) to disposal (GFCI) to panel, or use regular receptacles for both and use a GFCI breaker. No need for two separate GFCI receptacles. – manassehkatz-Moving 2 Codidact May 23 '19 at 17:15
  • Yes, what are the nameplate ratings for your dishwasher and disposal? – ThreePhaseEel May 23 '19 at 22:30
  • That panel is crazy small. Is it a subpanel? If not is it too late to fit a larger one? Reason I ask is, if that's your only panel, you'll be quickly forced to use double-stuffed breakers, and those don't come in GFCI or AFCI. Which is a problem! – Harper - Reinstate Monica May 23 '19 at 23:04
  • Panel is 200 amp. – H1991 May 23 '19 at 23:10

This is kind of a tricky question. For many years contractors connected the disposal and dishwasher on a split receptacle below the sink. Now with newer and larger appliances consuming more power there could be a problem.

Also there has been some conversations in the AHJ and Code communities about NEC 400.12 (2) Uses not permitted - Where running through holes in walls ... Does it mean a fixed appliance electrical cords passing through a cabinet wall? Right now it's kind of up in the air and I'm betting there will be a code clarification coming up in newer revisions.

If you can perhaps the smarter move would be to extend the circuit from the disposal receptacle and install a separate receptacle behind the dishwasher. Or super safe install a separate circuit for each appliance.

One last thing, both now need to be on GFCI protected circuits.

So make sure your GFCI protected, verify the circuit can hold the total load (that includes the start up surge of motors) using the nameplate data of the appliances and take it from there.

Hope this helps.

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  • Outstanding, Thank you for taking the time to share your knowledge! – H1991 May 23 '19 at 21:04

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