Originally Posted By: Bob Badger
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Here is where this has been asked before http://www.mikeholt.com/codeforum/ultimatebb.php?ubb=get_topic;f=13;t=000274
I answered over there but I have been thinking on this some more and looking closely at the code.
There is no direct answer to the question of NM to a disposal. ![icon_confused.gif](upload://qv5zppiN69qCk2Y6JzaFYhrff8S.gif)
334.30 requires a support for NM cable within 12" of a termination.
320.30 requires the same for AC cable (BX)
334.15(A) requires that exposed NM cable shall closely follow the surface of the building finish or of running boards.
320.15 requires the same thing for AC cable.
I will have to admit that most of the installations I have seen do not follow the surface of the building.
Now some opinion, if the NM cable comes out of the wall between the plumbing stops behind the disposal and straight out to it I see little chance of damage.
If the NM comes up through the bottom of the cabinet where it is sure to get hit by normal use of the cabinet I see a problem, however AC cable run this same way would also be a problem.
What I am saying is it all depends on how the work is done, use of common sense can go a long way.
It almost seems the use of a cord and plug is the only way to go.
But that is only true because of an article for disposals 422.16(B)(1) as most times flexible cord is not allowed as a substitute for the fixed wiring of a structure 400.8(1)
Wire ties in panels are not prohibited, but bundles of conductors or cables in any location are limited to 24" in length or are subject to the derating requirements of 310.15(B)(2)(a).
I agree with David the wire ties make working in the panel harder I will use them loosely when I have to with stranded wires.
Too much info huh, sorry but the code is tough to stay short with.
I am not suggesting that HIs need to know and tell their clients all the NEC but I feel if you are armed with that background you have a better ability to form decisions on your reports.
Bob (AKA iwire)
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