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Ot: Dishwashers

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drussell:

--- Quote from: Nusa on January 24, 2021, 03:16:18 am ---Of course it's also true that you have to consider other appliances on the same circuit, especially things you can't avoid using like the refrigerator.
--- End quote ---

The fridge receptacle is required to be on its own dedicated circuit.   ;)

I understand what you're saying though, but a 1000W dishwasher is no different than plugging in a 1500W toaster or deep fryer or something.  Most kitchens built in the past 50-60 years are going to have at least a couple circuits available for "heating" appliances, even in most of the oldest, smallest examples.

When specifically wiring for a fixed-mount dishwasher it has pretty much always been recommended best practice in north America to run a 12ga to the dishwasher, even if the originally installed model needs less and you even use a 15A breaker.  That way even the ones with beefy heating elements in them can be used later if desired, with at most a breaker change no actual rewiring required.  You could even go to a 240v unit if future requirements dictated.

rsjsouza:

--- Quote from: drussell on January 24, 2021, 06:29:50 pm ---
--- Quote from: Nusa on January 24, 2021, 03:16:18 am ---Of course it's also true that you have to consider other appliances on the same circuit, especially things you can't avoid using like the refrigerator.
--- End quote ---

The fridge receptacle is required to be on its own dedicated circuit.   ;)

--- End quote ---
Maybe in Canada, because in the houses that I lived here in the US... What a mess.

Quite different than Brasil, where houses above a certain area were required to completely segregate outlets from lighting circuits and built-in appliances (wall aircons, washers, boilers, shower head heaters, etc.).

drussell:

--- Quote from: rsjsouza on January 24, 2021, 07:27:15 pm ---Maybe in Canada, because in the houses that I lived here in the US... What a mess.
--- End quote ---

Huh...  you're right.  I always thought that one was the same in the US NEC as it is here...

Still obviously "best practice," but apparently still not required, even as of the 2020 NEC!

Crazy!!   :o

Nusa:
Even the 1950's house I'm living in now has a 20 amp circuit for the kitchen. But only one of them. Everything in the kitchen is on that single circuit, except for ceiling lights. Since I live alone now, that's manageable with a one-major-appliance-at-a-time rule, plus the refrigerator. Stove is gas, so that doesn't count.

tom66:
I have a similar capacity issue in my household.  The kitchen and downstairs circuit share 32A.  The tumble dryer, dishwasher and washing machine all active use about 28-29A.  I also occasionally want to charge my PHEV via a kitchen socket, and I haven't yet put in a wall box for it (didn't seem necessary this time when I moved) so that's another 10A.  So I need to balance load carefully especially overnight to avoid tripping circuits.

It seems to be now quite common in new UK homes to combine kitchen and downstairs circuits, but it's a mistake IMO, because the kitchen will often be heavily loaded, leaving no spare capacity for e.g. a space heater (when our boiler failed we used one) or vacuum cleaner.

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