revosolution
New member
can someone help figure out if you need to have a switch disconnect for the dishwasher other than the one on the machine for chicago code? thanks
dishwashers
- Thread starter revosolution
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stickboy1375
Senior Member
- Location
- Litchfield, CT
revosolution said:
I dont know about Chicago code, but the nec requires a disconnect if the unit switch does NOT break the ungrounded conductors.
Start at 422.30
jwelectric
Senior Member
- Location
- North Carolina
Jim W in Tampa
Senior Member
- Location
- Tampa Florida
Breaker lockout is all thats required.They must be the type that stays on the breaker and is ready for small pad lock.Its fastest and cheapist way.
SmithBuilt
Senior Member
- Location
- Foothills of NC
I'm curious where 422.32 comes in. I would have thought the dishwasher is motor driven and over 1/3 hp. Which if I understand correctly the disconnect would have to be within sight.
- Location
- Chapel Hill, NC
- Occupation
- Retired Electrical Contractor
SmithBuilt said:
Apparently there are some dw with only 1/8 hp motors. Hard to believe--- I have never used a breaker lock for this reason-- It is easy enough to add a switch.
stickboy1375
Senior Member
- Location
- Litchfield, CT
Jim W in Tampa said:
I doubt it Jim, unless the dishwasher is under 1/8th horse power... very unlikely.
stickboy1375
Senior Member
- Location
- Litchfield, CT
SmithBuilt said:
You are correct.
SmithBuilt
Senior Member
- Location
- Foothills of NC
I just looked at some on the GE site. There are some that are less than 1/8 hp, not many though. Most would be over the 1/8 limit.
Jim W in Tampa
Senior Member
- Location
- Tampa Florida
Its all i did on hundreds and passes.stickboy1375 said:
- Location
- Chapel Hill, NC
- Occupation
- Retired Electrical Contractor
Jim W in Tampa said:
Lots of jobs get passed even when things are not code compliant. Perhaps you had 1/8 hp motors but chances are the inspections is not catching it. I bet if I did not install a breaker lockout nor a disco in sight for my dw's they would still pass in most of my jurisdictions. That doesn't make it code compliant
stickboy1375
Senior Member
- Location
- Litchfield, CT
Jim W in Tampa said:
Were they over 1/8 HP? I can create code violations all day long too if I want. :roll:
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stickboy1375
Senior Member
- Location
- Litchfield, CT
jerm said:
ANywhere that is in sight of the motor controller
stickboy1375
Senior Member
- Location
- Litchfield, CT
jerm said:
Ever wire a commercial dishwasher? the same rules apply.
- Location
- Chapel Hill, NC
- Occupation
- Retired Electrical Contractor
jerm said:
I put it in the cabinet under the sink. The standard procedure around here has always been to float a switch box under the dw with a sp switch and handy box sw. cover.
I know it's not legal but that was the accepted practice. Now with all the dw that have no space under them I just install a switch in the sink cabinet. I leave a tail out for the dw and if the dw comes with a cord & plug I disconnect the tail and just put a receptacle in the box under the sink.
Yeah, but we mount a wet location disconnect (nema 4 or 12?) on the FRP with FMC or FNMC out the bottom into the (generally 3o) washer... These clean up rooms get hosed down top to bottom every so often.stickboy1375 said:
Never wired one inside a cabinet space besides my own here at the house, and it doesn't have any disconnect within sight btw... I guess the two wirenuts don't count.
egad. our dishwasher installs have all been considered "wet locations." I guess FNMC is still okay?
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dhducati
Member
- Location
- Pennsylvania
SmithBuilt said:
I'm wondering where 422.31(B) would apply to an HP-rated appliance in that case. I guess I'm wondering what type of appliance might be "rated over 1/8 hp" (422.31(B)) and not be a "motor driven appliance of more than 1/8 hp" (422.32).
Perhaps I'm confused by the wording. I can see that a dishwasher with a pump motor < 1/8 hp would fall into 422.31(B) (because the heater would take it over 300VA) but not 422.32.
Dave
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