Dedicated circuit for dishwasher or garbage disposal

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Adamjamma

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I may be wrong but it seems like dedicated wiring is needed for the two outlets described. Now, the washing machine circuit is easy because we have basically agreed in another post that one would be able to run more than one outlet on this circuit, for an ironing board and a washing machine, so one could use a gfci outlet above the machine, and feed from it to the plug spot behind the machine thus by tripping the gfci outlet you can shut power to the washer as well. Plus the outlet for the washer is protected by gfci.

But, can you do the same for the kitchen outlets? Could you for instance put a gfci outlet above the counter, run from load into a double pole switch, then into the outlet under the sink for the garbage disposal, thus providing gfci protection for the disposal?
and do the same for the dishwasher?

This is theoretical for now... because in the UK I normally use a fused switch above the counter for any outlets I put in under the counter, such as dishwasher, washing machine, etc... so they can be disconnected before I start trying to pull equipment out from the cabinets.
Personally, would love to see something like a fused switch with a gfci on it for undercabinet items such as fitted appliances, if the drive to full afci and gfci protection continues...but that is a personal choice...lol
 
You cannot put any extra loads on a SABC not specifically allowed. 210.52(B(1) and (2).

A DW and a disposal can share a circuit unless the amperages are too high combined, unlikely, or manufacturer requires an individual circuit. 110.3(B), 210.19(A)(1) and (2).
 
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Ok..got some reading to do when other computer is charged... f1 getting ready to qualify soon..lol... need to read the sabc regs..lol...
but, refresh me if I am wrong...
if a circuit must have gfci then the gfci must be accessible for resetting means... right?
Land all circuits in the kitchen now seem to need gfci and afci pretty much... even the fridge needs afci although it may not need gfci...

so, does that make you need the dual afci gfci breaker then... which then begs the question of how well can you troubleshoot the circuit?
 
You can have a dedicated circuit with a dead front GFCI on the counter to protect the GD/DW receptacle under the sink cabinet. But as mentioned earlier the SABC may not power the DW/GD.
 
Adamjamma said:
1)if a circuit must have gfci then the gfci must be accessible for resetting means... right?


2)so, does that make you need the dual afci gfci breaker then... which then begs the question of how well can you troubleshoot the circuit?
Click to expand...

1) Readily accessible. See definition Article 100

2) I have installed a total of 2 AFCI circuits in my career. I know the codes, but not much more.
I got no advice other than normal methods. No tricks or tips, sorry.
 
jumper said:
You cannot put any extra loads on a SABC not specifically allowed. 210.52(B(1) and (2).

A DW and a disposal can share a circuit unless the amperages are too high combined, unlikely, or manufacturer requires an individual circuit. 110.3(B), 210.19(A)(1) and (2).
Click to expand...

what about exception number two for a separate circuit? I am talking a separate circuit from panel, but with a gfci outlet above the countertop, feeding a dishwasher under the countertop.. no other circuits... and not a regular part of the sabc.
 
Adamjamma said:
what about exception number two for a separate circuit? I am talking a separate circuit from panel, but with a gfci outlet above the countertop, feeding a dishwasher under the countertop.. no other circuits... and not a regular part of the sabc.
Click to expand...
I do not think that would qualify if you used a GFCI receptacle above the countertop, since you would be providing a general purpose outlet in the kitchen area which is not on an SABC. But you can clearly use a dead-front (no receptacle) GFCI above the countertop if you want.
 
Adamjamma said:
what about exception number two for a separate circuit? I am talking a separate circuit from panel, but with a gfci outlet above the countertop, feeding a dishwasher under the countertop.. no other circuits... and not a regular part of the sabc.
Click to expand...

No, not under the 2014 or the 2017 NEC.

Read the definitions of the different types of branch circuits in Article 100.
 
so, under branch circuit-appliance, where it says one or more outlets but only specifies no luminaires, that would not account for it? Just trying to make sure. if under that or under the general purpose branch circuit? I mean, yes, it is dedicated in regards to the appliance(s) but the only relationship it has with the above the counter kitchen receptacles is the fact it is in addition to them and has an outlet above the countertop.

OR, is the position that any circuits that serve outlets above the countertop automatically become Small Appliance Circuits?
 
Adamjamma said:
so, under branch circuit-appliance, where it says one or more outlets but only specifies no luminaires, that would not account for it? Just trying to make sure. if under that or under the general purpose branch circuit? I mean, yes, it is dedicated in regards to the appliance(s) but the only relationship it has with the above the counter kitchen receptacles is the fact it is in addition to them and has an outlet above the countertop.

OR, is the position that any circuits that serve outlets above the countertop automatically become Small Appliance Circuits?
Click to expand...

The latter....
 
Could you possibly lead me to that exact statement because I am going back and forth in the book and do not read it that way myself... not trying to argue here but, I am looking in both the 2011 and 2017 and do not see where it says that by placing an outlet above the counter when you already have your two sabc circuits in the kitchen... that outlet becomes an sabc.....
nor do I see that the outlet feeding the dishwasher may not be fed from another outlet... only that gfci must be accessible, and that the outlet feeding the dishwasher must be accessible such as in the next space.. thus placed in an area like under the sink rather than behind the dishwasher.

Perhaps i I am missing it somewhere?
 
OK.. Maybe I am confused. A dishwasher is an appliance. 210.52.b.1 exception 2 allows a dedicated appliance served by a branch circuit... but does not specify no other outlet, just branch circuit. The definition of small appliances does not say a dishwasher or garbage disposal is not a small appliance.
and the we have the section elsewhere that specifically addresses dishwashers and garbage disposals does not address other outlets but simply states that if a plug and outlet is used they must be accessible, and in the case of a fixed in place dishwasher, must be in the next space, which means, in my mind, in the space under the sink where the garbage disposal plugs in at. So, I should be able to feed them both from a 20 amp breaker to a 20 amp gfci outlet, then through a switch to one side of the outlet under the sink for the garbage disposal and use the other half of the outlet for the dishwasher. Thus I have gfci protection accessible, and the units are both served.
I would rather use two 20 amp gfci switches above the sink, no outlets above the sink, to the outlet under the sink, so I could cut power to the dishwasher if a problem occurred, but..
However: General consensus is my way is not to code and I should just run a 20 amp AFCI/GFCI breaker direct to the outlets under the sink.. with a 20 amp switch loop above the sink for the garbage disposal. Just as long as the dishwasher is not in the same cabinet space as the outlet that serves it.
OK. Think I have this question figured out then. Now on to another one from one of these magazine articles I am reading to try to figure out if my understanding of the codes is right. I like using old handyman questions and such to try to learn new code.
By the way, the only differences between the question in the 70's in the magazine and now was the use of gfci. The answer in the seventies was to run a switch for the one half of the outlet to operate the garbage disposal, by using a switch and outlet duplex above the counter, and feeding the outlet with 4 wires, one hot feed from the switch, one hot feed from the outlet, one neutral and one ground... and breaking the tab on the outlet under the sink.

Anyway. Thanks everyone.
 
The following establish the requirement for the minimum of two 20a SABC:

210.11(C) Dwelling Units.
(1) Small-Appliance Branch Circuits. In addition to the number of branch circuits required by other parts of this section, two or more 20-ampere small-appliance branch circuits shall be provided for all receptacle outlets specified by 210.52(B).


210.52(B)(1) states where those two circuits can go.

210.51(B) Small Appliances.
(1) Receptacle Outlets Served. In the kitchen, pantry, breakfast room, dining room, or similar area of a dwelling unit, the two or more 20-ampere small-appliance branch circuits required by 210.11(C)(1) shall serve all wall and floor receptacle outlets covered by 210.52(A), all countertop outlets covered by 210.52(C), and receptacle outlets for refrigeration equipment.


210.52(B)(2) says they cannot go anywhere else.

210.51(2) No Other Outlets. The two or more small-appliance branch circuits specified in 210.52(B)(1) shall have no other outlets.


This means: Not to a disposal. Not to a dishwasher. Not to the built-in microwave. Not to a trash compactor. Not to a wine cooler. The NEC is not just going to state: "You cannot use an SABC to feed both a countertop receptacle and the disposal and/or dishwasher".


 
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