dishwasher/garbage disposal

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Ken 6789

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I've always thought that a DW and GD should be on separate 20 amp circuit, but have seen them wired on the same circuit. Does anyone else normally wire them on the same circuit?
 
Ken 6789 said:
I've always thought that a DW and GD should be on separate 20 amp circuit, but have seen them wired on the same circuit. Does anyone else normally wire them on the same circuit?


thats typically how its done around here...
 
iwire said:
With a 20 amp circuit there is no issue unless one of the appliances is more then 10 amps.

I believe most of today's dishwashers are more than 10 amps -- I could be wrong--but I think the rule that Bob is referring to makes no sense in the case of a disposal. A disposal is on for seconds and I doubt it could ever overload the 20 amp breaker with the dishwasher running.

I am not advocating disregard for the code, I just don't see a safety issue with it. I prefer to hook the disposal to a lighting circuit-- undercounter lights and perhaps a few others.
 
somebody on here a while back in a similar post told about a clever idea to use a three way switch as a selector between diswasher and garbage disposal, down to power up dishwasher, up to turn on garbage disposal.
 
ultramegabob said:
somebody on here a while back in a similar post told about a clever idea to use a three way switch as a selector between diswasher and garbage disposal, down to power up dishwasher, up to turn on garbage disposal.


Thats great till the DW is in the middle of a cycle and it gets shut off. :grin:
 
I agree with Dennis although the code may not support that argument.:rolleyes:

Is there a specific code article that allows two fastened in place appliances (over or under 10 amps each) to be on the same circuit?
 
stickboy1375 said:
Thats great till the DW is in the middle of a cycle and it gets shut off. :grin:


It wouldnt hurt anything with a mechanical timer, I dont know what would happen with a fancy digital push button jobby.
 
Ken 6789 said:
I've always thought that a DW and GD should be on separate 20 amp circuit, but have seen them wired on the same circuit. Does anyone else normally wire them on the same circuit?


Do you have an extra space to allow that? If you do, then why not???
 
this debate has gone on for years. i have put the dishwasher and disposer on the same circuit for 16 yrs., and at my own house too. i have never had any problem with this installation and none of my inspectors have ever questioned it.
 
sparky59 said:
this debate has gone on for years. i have put the dishwasher and disposer on the same circuit for 16 yrs., and at my own house too. i have never had any problem with this installation and none of my inspectors have ever questioned it.

None of that has anything to do with what the NEC actually requires. :grin:
 
76nemo said:
Are you footing the bill?

My guess is you have never worked in the residential construction markets. When I did that back in the 80s we did not give away anything.

At that time we could run one circuit from the panel to the first bathroom hit a GFCI receptacle then continue on to any other bathrooms then onto outside so we did not have to buy more then one GFCI.
 
I'll either run a shared 20a circuit or two 15a circuits, depending on appliance requirements.
 
iwire said:
My guess is you have never worked in the residential construction markets. When I did that back in the 80s we did not give away anything.

At that time we could run one circuit from the panel to the first bathroom hit a GFCI receptacle then continue on to any other bathrooms then onto outside so we did not have to buy more then one GFCI.


So we are getting down to the nitty gritty and worried about losing bids on this???
 
76nemo said:
So we are getting down to the nitty gritty and worried about losing bids on this???

one circuit may not seem like alot on one job, but what if you can trim three or four things like this on each house, if you are doing a hundred houses a year it adds up....
 
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