I have never did this and I also tell electricians that they can not go off the disposal circuit to feed the lighting over the sink and in the kitchen. I am trying to find as many places I can in the nec that will show that you can't do that. Anyone want to help ? so far I am looking at 210.23 A "small appliance Exception" . dont have a cut sheet on a disposal unit so I can't look at that. 422.16 B1 is no help on this. I may be just too tired to find this right now ! LOL. and if it is a small appliance, should it be wired in 12 instead of 14 ? . Looking forward to responses on this .. Thanks !
Sorry to disappoint but the disposal is not a small appliance in the NEC sense and it can be wired with 14 AWG, and yes you can run the lighting and the disposal together.
210.23(A) 15- and 20-Ampere Branch Circuits. A 15- or 20-ampere branch circuit shall be permitted to supply lighting units or other utilization equipment, or a combination of both, and shall comply with 210.23(A)(1) and (A)(2).
A small appliance is a something that is allowed to be fed from the small appliance branch circuit, you may not feed a disposal with the small appliance branch circuit.
A disposal is utilization equipment fastened in place and as long as it meets 210.23(A)(2) it is allowed to be on with the lighting circuit.
[210.23(A)(2) Utilization Equipment Fastened in Place. The total rating of utilization equipment fastened in place, other than luminaires (lighting fixtures), shall not exceed 50 percent of the branch-circuit ampere rating where lighting units, cord-and-plug-connected utilization equipment not fastened in place, or both, are also supplied.
Question, what is the electrical safety hazard by having the disposal on with the lights?
90.1 Purpose. (A) Practical Safeguarding. The purpose of this Code is the practical safeguarding of persons and property from hazards arising from the use of electricity.
(B) Adequacy. This Code contains provisions that are considered necessary for safety. Compliance therewith and proper maintenance will result in an installation that is essentially free from hazard but not necessarily efficient, convenient, or adequate for good service or future expansion of electrical use.
The great thing is we can always choose to go beyond code minimums, I would run a separate circuit but I am not required to.
Bob Badger Construction & Maintenance Electrician Massachusetts
Re: Garbage Disposal with kitchen Lighting !#87862 04/23/0401:45 PM04/23/0401:45 PM
Although not REQUIRED by the NEC, I believe (as others) that a "quality install" would have a dedicated line to the disposal. Tapping the lighting off of the GD circuit more than likely will result in 'dimming' when the GD is started.
Without the nameplate data for the GD, I cannot give you a valid NEC Article to dispute the install, as you described it.
Re: Garbage Disposal with kitchen Lighting !#87863 04/23/0402:56 PM04/23/0402:56 PM
Learn somthing everyday ! I see people taking all the kitchen cans off the disposal circuit and yes the lights dim when it is turned on. Even if this is not a violation I still would never do that. What if they went out and bought the binford 5000 to really chop it up ? tripping the breaker and in the dark when they turn it on ? . Thanks for your help on that, Gary
Gary, as poor as the design is, there is no hazard. Assume the disposal was locked and the overload did not take the motor off line. After a period of time, the circuit breaker opened and the lights went out. Would that be a safety problem? I don't think so.
Charlie Eldridge, Indianapolis Utility Power Guy
Re: Garbage Disposal with kitchen Lighting !#87865 04/23/0404:19 PM04/23/0404:19 PM
So it seems I could have saved alot of time and money on this for the past 25 years ! When I was a young apprentice back in the day I got in deep trouble for doing that once and I never thought about doing it again. Learn somthing every day !
Interesting. When I first started the local inspector told me lighting could never be put on that circuit as it was considered a motor circuit and therefore had to be dedicated. I've seen hundred of "violations" to that since but still think the disposal is better off alone...
Re: Garbage Disposal with kitchen Lighting !#87868 04/30/0401:31 PM04/30/0401:31 PM
I know this doesn`t matter but the reason for people stretching the design limits is actually to save money.I to would only install the over the sink light with this not anything else.If it is my house it would be dedicated or my buddy`s house. But for some GC who takes lowest bid I wouldn`t have much choice.But I must sleep at night also and with our name on the panel i`d limit the number of lights on it. Iwire you da man I learn something everytime you post with all the artical #`s Thanks.
Re: Garbage Disposal with kitchen Lighting !#87869 05/01/0406:30 AM05/01/0406:30 AM
Something to think about... most disposals do not draw more than 7 amps, and are usually installed on a 20 amp circuit. 210.19 permits combination loads as long as the motor is not more than 50% of the branch circuit rating. Adding a few lights to the disposal circuits is actually in my thoughts a good and resourceful design, why waste anything today. As far as the lights dimming, how often is the disposal actually used? ... probably less than 5 minutes a day.