???Wall switch for the Dishwasher???

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77401

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After reading Stu Goforths' Dishwasher Thread I thought of something too!

Wall switch for the dishwasher? Next to the Disposal Switch? WTF is this for?

422.31(a) Allows the circuit breaker to be the disconnecting means.
Is this an old code requirement that was changed in the last 40 years?
I see this in all the older homes & Still see it being done in the newer homes today.
I understand most everyone today is using the wall plug under the sink with a cord connected dishwasher 422.16 B(2) & Disposal. 422.16B(1)

I just did a kitchen remodel & should have take a picture of this, but what I found was.... Under the sink 2 wall switches, One was for the dishwasher, the other fed another wall switch on the back splash for the Disposal. Yep 2 switches in series.
I've been to 2 rodeos and a goat screwing, I thought I had seen everything. :D

Iwire... See I too am now refereing the code article. :!:
 
Re: ???Wall switch for the Dishwasher???

77401 said:
Iwire... See I too am now referring the code article. :!:
Click to expand...

:lol:

That's good. 8)

We don't know what you have in your mind if you don't provide the code references.

I am giving this a total outright guess, take it for what it is worth.

For years DWs where being installed without disconnects.

At some point someone noticed that was a violation. An easy solution to the problem was a switch with or near the disposal switch.

Time moved on and the NEC started allowing the unit switch and / or lockable breakers to take the place of the switch.

Now we are back to no local disconect for the DW.

IMO DW unit switches are becoming less likely to meet the requirements in order to use them for this purpose.

A unit switch(es) with a marked-off position that is a part of an appliance and disconnects all ungrounded conductors

IMO An electric button does not meet that requirement.
 
I agree with Bob. The old dishwashers with the mechanical timers disconnected the power to the appliance when they were in the OFF position. With the new electronic controls on many dishwashers today, it's not likely that the electronic switching will meet the requirement that Bob posted. We still hardwire dishwashers and provide a $.50 breaker lock at the panel.
 
Why a breaker lock? Code reference please? :?
today we wire everything new & remodel with a cord attched wall plug 422.16B(2) Never had a question from one inspector about this?

I guess I was really curious about the older houses. I understand the reason it still shows up on the new houses is, people don't read the code and refer articles numbers( You got me going Iwire :D ) Its just more monkey see monkey do.
 
Why a breaker lock? Code reference please?
today we wire everything new & remodel with a cord attched wall plug 422.16B(2) Never had a question from one inspector about this?
Click to expand...


Look at 422.31(B). A breaker lock is used to allow the disconnecting means to be the CB that is not within sight of the appliance. A cord and plug connection is also suitable as a disconnecting means.


(B) Appliances Rated Over 300 Volt-Amperes or Horsepower. For permanently connected appliances rated over 300 volt-amperes or hp, the branch-circuit switch or circuit breaker shall be permitted to serve as the disconnecting means where the switch or circuit breaker is within sight from the appliance or is capable of being locked in the open position. The provision for locking or adding a lock to the disconnecting means shall be installed on or at the switch or circuit breaker used as the disconnecting means and shall remain in place with or without the lock installed.
Click to expand...
 
77401 said:
infinity said:
Look at 422.31(B). A breaker lock is used to allow the disconnecting means to be the CB that is not within sight of the appliance. A cord and plug connection is also suitable as a disconnecting means.
Click to expand...

Over 300 volt Dishwasher? Must be a pot scrubber!!

:twisted:
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I think that you misread the article, it says "300 Volt-Amperes". :wink:
Click to expand...
 
In terms of wall switch for disposal, I've seen lots with no more that a 3 way. Feed the switch & up disposal will run and down the dw has power.
 
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