How to Install Electrical Wiring for a Garbage Disposal
Garbage Waste Disposal Circuit Wiring: Electrical Connections for a Garbage Disposal, Disposal Switch, Dishwasher Disposal Wiring in Older Homes.
Wiring a Garbage Disposal
Electrical Question: I recently installed a under the sink outlet for my 1/2 hp garbage disposal which is not on a GFCI.
- I had the option of drawing the power from a nearby GFCI above the counter or a regular outlet that doesn’t draw from the GFCI. I chose to draw the power from the normal outlet on the wall.
- The disposal works great, but I’m having second thoughts about not drawing from the GFCI.
- The reason I’m having second thoughts is that the wire now runs through the back of 3 cabinets which I will have to cover with wire molding for protection.
- This is turning out to be a lot of work. The GFCI would involve 1 cut through the wall and one cut into the cabinet under the sink. Protecting this wire from potential damage would be a lot easier.
- The reason I didn’t go the GFCI route originally was because of mixed information I was getting on the Internet about garbage disposals tripping GFCI outlets repeatedly.
- Should I retire the disposal outlet so that it draws power from the GFCI or should I leave it how it is and start putting in precautions to protect the wire?
This home electrical repairs question came from: George, from Scranton, Pennsylvania.
Additional Comments: I wish I found this site earlier, it is by far the best electrical related resource I have found on the web.
Thanks for your electrical troubleshooting question George.
Application: Wiring a Disposal Circuit
Skill Level: Intermediate to Advanced.
Tools Required: Basic Electricians Pouch Hand Tools, electric drill, auger bits and extension cord.
Estimated Time: Depends on personal level experience, ability to work with tools and install disposal circuit wiring.
Notice: Installing additional electrical circuit wiring should be done according to local and national electrical codes with a permit and be inspected.
Electrical Connections for a Garbage Disposal
- Garbage Disposal Circuit
- A garbage disposal is typically provided with a 120 volt 20 amp circuit that is shared with the dishwasher.
- Garbage Disposal Switch
- A switch is located at the kitchen counter top area to conveniently operate the garbage disposal.
- GFCI Protected Circuit
- The electrical circuit for the dishwasher and the garbage disposal is now required to be protected by GFCI even though the outlet receptacle is not readily accessible or located above the kitchen counter top, but rather the receptacle outlet is typically located below the kitchen sink where a cord from the garbage disposal and the dishwasher may be plugged into and accessible for servicing.
- Dishwasher Disposal Wiring in Older Homes
- With some older homes the dishwasher outlet may be found behind the dishwasher, however I find this very hard to access and impractical, therefore I prefer to plug in the dishwasher into the receptacle under the sink along with the garbage disposal.
- Converted Direct Wiring Method
- In some cases the original wiring was connected directly to the garbage disposal.
- This method may be upgraded where a surface mounted receptacle outlet may be installed under the sink and a plug and cord may be installed on the garbage disposal.
See More about Home Electrical Wiring
Garbage Disposal and Dishwasher Wiring
Fully explained dishwasher disposal wiring diagrams with pictures for wiring the outlet that serves a dishwasher and a garbage disposal. One very important element can be easily overlooked as you will see in these pictures.
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