Disposal Cord with Switched GFI under Sink?

1

1.21 Gigawatts

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Norwalk, CT
I want to use a plug in cord for the disposal and have a GFI under the sink for it but I need the switch to be in the backsplash near the sink. Can that switch on the countertop switch the GFI under the sink in the cabinet?

Wired like this? Don't worry, grounds will be all done and I plan on having a neutral in the switch box doing nothing. Running 12-3 to switch box.

OR.. should I get one of those GFI switches for the countertop since there are no receptacles near the sink. Would still need GFI under the sink for the cord to plug into so not sure how that all would be wired.
1749580307662.png
 
No problem, however I'm sure there are some inspectors that might question the GFCI under the sink being readily accessible
 
roger said:
No problem, however I'm sure there are some inspectors that might question the GFCI under the sink being readily accessible
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Good point. Now Im veering towards the GFI switch on counter top and just a regular receptacle under sink protected by that GFI. I assume it can be wired like that?

Is anything on this switch protected by the GFI? I ask because there is no typical "load" side here.
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Nevermind, I think I answered my own question looking at this. instead of the light, I would just bring the black of receptacle under sink to that single corner wire on the right here. And the neutral from under sink receptacle to the load side neutral of GFI. That should make the switch work that disposal outlet under sink and be protected by GFI

1749584076998.png
 
1.21 Gigawatts said:
Good point. Now Im veering towards the GFI switch on counter top and just a regular receptacle under sink protected by that GFI. I assume it can be wired like that?

Is anything on this switch protected by the GFI? I ask because there is no typical "load" side here.
View attachment 2578119
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Most those types of switch/GFCI combo units I have seen are like what the instructions you posted are. Switch is totally separate from the GFCI but could be wired in series with the GFCI. Also most those I have seen usually are lighter duty rating switch (like maybe 3 to 6 amps) so you might want to look at the specifications for what you have to make sure it can handle the motor you wish to control with it.
 
kwired said:
Most those types of switch/GFCI combo units I have seen are like what the instructions you posted are. Switch is totally separate from the GFCI but could be wired in series with the GFCI. Also most those I have seen usually are lighter duty rating switch (like maybe 3 to 6 amps) so you might want to look at the specifications for what you have to make sure it can handle the motor you wish to control with it.
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Another great point. I do notice the switch wire is much higher gauge. Disposal is 1HP so 6amps.
 
Can you use a pneumatic switch kit, and feed the under counter receptacle with a GFCI breaker?

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Or, can you use a standard wall switch and feed the circuit with a GFCI breaker?


SceneryDriver
 
infinity said:
T430.248 lists a 115 volt, 1HP motor at 16 amps.
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This one says 11.6amps

InSinkErator Medium Capacity SS-100 Commercial Garbage Disposal, Stainless Steel, 1 HP,115-208/230V, Single Phase (3JK90) | Direct Supply

Shop InSinkErator Medium Capacity SS-100 Commercial Garbage Disposal, Stainless Steel, 1 HP,115-208/230V, Single Phase. Senior Living & Healthcare's #1 Supplier. Fast & Free Shipping.
store.directsupply.com store.directsupply.com

But this is the one Im going with. Plan on sharing dishwasher with it.

 
1.21 Gigawatts said:
This one says 11.6amps

InSinkErator Medium Capacity SS-100 Commercial Garbage Disposal, Stainless Steel, 1 HP,115-208/230V, Single Phase (3JK90) | Direct Supply

Shop InSinkErator Medium Capacity SS-100 Commercial Garbage Disposal, Stainless Steel, 1 HP,115-208/230V, Single Phase. Senior Living & Healthcare's #1 Supplier. Fast & Free Shipping.
store.directsupply.com store.directsupply.com

But this is the one Im going with. Plan on sharing dishwasher with it.

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If this disposal draws 11.6 amps and you plan on sharing the circuit with the dishwasher using a 20 amp circuit, I think you would be in violation of NEC Art. 210.23 (A)(2)
 
Rick 0920 said:
If this disposal draws 11.6 amps and you plan on sharing the circuit with the dishwasher using a 20 amp circuit, I think you would be in violation of NEC Art. 210.23 (A)(2)
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That would not apply to two fastened in place appliances. As long as the two do not exceed the 20 amp rating of the OCPD they can be on the same circuit.
 
Customer going with 3/4HP now and the specs state its 9.4amps. With a 7.5A dishwasher its within the limit. Problem is believing the specs. I'd like to run a test on the disposal first to see what its actually drawing, without food scraps.

Customer asked if he can just change the breaker to a 30Amp. 🤣 Oh boy, little do they know.
 
1.21 Gigawatts said:
Customer going with 3/4HP now and the specs state its 9.4amps. With a 7.5A dishwasher its within the limit. Problem is believing the specs. I'd like to run a test on the disposal first to see what its actually drawing, without food scraps.

Customer asked if he can just change the breaker to a 30Amp. 🤣 Oh boy, little do they know.
Click to expand...
Keep in mind that even if the current went over 20A, the disposal is only on for a few seconds. Not nearly enough time to cause an overload to trip the breaker.
 
1.21 Gigawatts said:
Customer going with 3/4HP now and the specs state its 9.4amps. With a 7.5A dishwasher its within the limit. Problem is believing the specs. I'd like to run a test on the disposal first to see what its actually drawing, without food scraps.
Click to expand...
Historically manufacturer's like to fudge the actual HP rating.
 
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