Disconnect Location for Commercial Dishwasher

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Meredith

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I have a dumb General Contractor question for you guys.
Here is the scenerio - the drawings show the disconnect for a commercial dishwasher booster pump to be at +/-18" AFF. However this puts the disconnect below the dishwasher tray counter which will constantly have water on it. Isn't there a code that states the disconnect should not be under a water source? Please advise. Thanks!
 
Meredith said:
I have a dumb General Contractor question for you guys.
Here is the scenerio - the drawings show the disconnect for a commercial dishwasher booster pump to be at +/-18" AFF. However this puts the disconnect below the dishwasher tray counter which will constantly have water on it. Isn't there a code that states the disconnect should not be under a water source? Please advise. Thanks!
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Use an outdoor rated disco and it's legal. The last one I did I put on the wall about 36" above the tray counter.
 
If it can be considered likely to be examined (serviced) while energized, regular working access rules would not easily allow it under or over the tray 110.26.
 
Volta said:
If it can be considered likely to be examined (serviced) while energized, regular working access rules would not easily allow it under or over the tray 110.26.
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I should have been more clear, normal working clearances apply here, inmy situation, the dishwasher was 30" from a corner. I put my disconnect 36" higher than the tray counter. But I still had my clearances
 
If you are going to say that the disconnecting means requires the working clearances in 110.26 you cannot put it under or over the shelf.

110.26 would require 30" wide from the floor up to at least 6'-6" above the floor, the shelf could not be there and nothing could be stored in that space.

Now what the code says and what is really going to happen in a commercial kitchen can be pretty far apart. Often you would be better off mounting the disconnect on another wall in a spot that is in sight and not more than 50' from the dishwasher.

As far as the water issue .... if it is going to get wet you need to order at least a NEMA 3R or if it was up to me I would go with a NEMA 4 which keeps water out in all directions.
 
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Meredith said:
I have a dumb General Contractor question for you guys.
Here is the scenerio - the drawings show the disconnect for a commercial dishwasher booster pump to be at +/-18" AFF. However this puts the disconnect below the dishwasher tray counter which will constantly have water on it. Isn't there a code that states the disconnect should not be under a water source? Please advise. Thanks!
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Suggest moving it to a wall within site for ease of maintenance, safety and longevety of equipment. See if 422.31 A or B are applicable. (B most likely)

Ask if the disconnect will have over-current protection or not....
 
Anyone that's ever installed one of these knows how unlikely it is that working clearances can be met. Just too much stuff in too small of a room.

Don't forget the second disconnect for the exhaust fan if it's interconnected and on a different circuit.
 
fishin' electrician said:
Anyone that's ever installed one of these knows how unlikely it is that working clearances can be met. Just too much stuff in too small of a room.

Don't forget the second disconnect for the exhaust fan if it's interconnected and on a different circuit.
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that is where the 50 feet and within sight comes in - you may be able to put it somewhere else in the room.

But even if you determine you do not need working clearance, under the counter is often the worst possible place for it. Not only does it get wet here but some detergents, sanitizers, etc. are often corrosive and Now you need NEMA 4X enclosure and is usually hard to get to.
 
iwire said:
If you are going to say that the disconnecting means requires the working clearances in 110.26 you cannot put it under or over the shelf.
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I agree but interestingly enough this question came up at the NC Electrical Institutes annual meeting only it was in reference to an a/c disco. The CMP panel member Alan Manche answered with a definite "YES". I got up and asked him how you would handle the height req. of article 110.26 when dealing with a disco in a crawl space for an electric furnace.

He smiled and said I guess you can't. Another "yes, no" answer from the panel. :) He was saying you have to try and fulfill the req. if possible.
 
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