NMC supplying dishwasher

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smallfish

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Is it permissible to supply an under-the-counter kitchen dishwasher (General Electric type Cafe) by poking a small hole in the drywall behind it and pulling through the hole a nmc cable and extending the cable on the floor on the underside of the dishwasher where the termination box is located?
The manufacturer did not provide a power supply cord and the instructions indicated a permanent wiring means, but did not elaborate. The dishwasher will be fastened in place and trimmed all around. The individual branch circuit will be protected with a lockable type circuit breaker. Is this the correct use of nmc cable and if not what section of code does it violate? What would be the correct wiring method if this isn't?
Thanks
 
smallfish said:
Is it permissible to supply an under-the-counter kitchen dishwasher (General Electric type Cafe) by poking a small hole in the drywall behind it and pulling through the hole a nmc cable and extending the cable on the floor on the underside of the dishwasher where the termination box is located?
The manufacturer did not provide a power supply cord and the instructions indicated a permanent wiring means, but did not elaborate. The dishwasher will be fastened in place and trimmed all around. The individual branch circuit will be protected with a lockable type circuit breaker. Is this the correct use of nmc cable and if not what section of code does it violate? What would be the correct wiring method if this isn't?
Thanks
Click to expand...

It is done that way all the time. The nm cable just floats under the dw because there is no way to fasten it. Why are you using NM-C. I have never seen it.
 
I agree with Dennis,

It is common pratice to run NM cable from the wall on the floor under the dishwasher and connect to the diswasher termination box.

Chris
 
stickboy1375 said:
I have a problem with this method of hard wiring a dishwasher, what about 422.32?
Click to expand...

Me too.

The only way that this is acceptable...as in code worthy...is if a switch is installed to disconnect the power to the dishwasher.
A breaker lock won't comply with 422.32

Just my opnion
steve
 
hillbilly said:
Me too.

The only way that this is acceptable...as in code worthy...is if a switch is installed to disconnect the power to the dishwasher.
A breaker lock won't comply with 422.32

Just my opnion
steve
Click to expand...

I agree but want to add either a SWITCH or a CORD & PLUG or a UNIT SWITCH is the only legal way to install a dishwasher. At least with todays units, good luck finding one under 1/8th HP.... You can also have a panel within sight of the DW as well. :)
 
stickboy1375 said:
I agree but want to add either a SWITCH or a CORD & PLUG or a UNIT SWITCH is the only legal way to install a dishwasher. At least with todays units, good luck finding one under 1/8th HP.... You can also have a panel within sight of the DW as well. :)
Click to expand...


Yep..all that's true.
I was answering the OP specifically.

I've never used the "unit switch" as the disconnect, as I've never been able to tell if it completely disconnected the un-grounded conductor unless I took the dishwasher apart.:)

I normally use a cord and plug, and I dont see many breaker panels in the kitchen.:smile:

steve
 
Hard wired with NM is legal and accepted all over. Breaker lockout must be installed. Lock out must be the type that is in place at all times without the lock installed.
 
Cavie said:
Hard wired with NM is legal and accepted all over. Breaker lockout must be installed. Lock out must be the type that is in place at all times without the lock installed.
Click to expand...

I agree, it's the accepted way things are done around here. 422.31(B).
 
hillbilly said:
Yep..all that's true.
I was answering the OP specifically.

I've never used the "unit switch" as the disconnect, as I've never been able to tell if it completely disconnected the un-grounded conductor unless I took the dishwasher apart.:)

I normally use a cord and plug, and I dont see many breaker panels in the kitchen.:smile:

steve
Click to expand...

If it has a touch panel it has no "unit switch"
 
I realize the lockout is required unless a switch is nearby the unit to serve as a disco, however, I wonder how needed it really is, especially in a SFD setting. My builders grade DW lasted for 15 years without needing service. Since that would be a dedicated circuit or at most shared with the disposal the chance of someone turning a breaker on while someone was servicing the DW seems remote.
 
If a breaker lock out device is actually installed on the panel, how often do you think it would get used?

I would bet that a breaker lockout/tagout never gets used in a residential location.
 
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