Any got a NFPA 79 code book? I'm connecting a new dust collector for a customer in the coming month, ahead of delivery he got me the manual. And its states that I can't use wirenuts to hook up the motor per NFPA 79 13.5.9 but I don't have that book to look it up and a Google search didn't work. I'm only running #12 seems, I get not soldering, but splitbolts are ok? Seems weird.
Nfpa 79 code question
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Chapter 13 is simply called "Wiring Practices"
na I'll just use like a polaris insulated connector, they got one thats ment for fine motor wire.
ron
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- New York, 40.7514,-73.9925
Any NFPA Standard can eb viewed for free after you make a free account sign-in to the nfpa.org website.
mikeames
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Here is is from NFPA link
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- Illinois
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- retired electrician
Does NFPA 79 even apply to the wiring installed by the electrician in the field?
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- Wisconsin
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- PE (Retired) - Power Systems
Only if it has been included as part of the projects specs. But even than NFPA79 is the standard for industrial equipment not premises wiring.
petersonra
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- Semi-retired engineer
It does not apply to anything unless it is contractual. It is not like it is a legal requirement like the NEC typically is.
One could argue pretty well that it is the de facto standard for industrial machinery electrical wiring in the US and thus there is some duty to abide by it.
I would say if you agreed contractually to abide by NFPA79, all the wiring associated with it is part of the deal including wiring to motors done in the field.
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- Wisconsin
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- PE (Retired) - Power Systems
But not every piece of motor equipment is built per NFPA 79. For example I don't think it applies to a belt driven ventilator fan or a simple water pump, neither of which is usually sold with control panels much beyond dedicated starters and which are often subject to Listing standards.
petersonra
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- Northern illinois
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- Semi-retired engineer
I don't think your examples would meet the definition of industrial machinery found in NFPA79 so would not apply.
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- Wisconsin
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- PE (Retired) - Power Systems
That is what I am saying. Would a contractual spec apply to motor connections to which NFPA 79 does not address?
petersonra
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- Northern illinois
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- Semi-retired engineer
They could make it a contractual requirement.
TwoBlocked
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- Bradford County, PA
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- Industrial Electrician
But what does 13.5.9.2 really mean? That twist-on wire connectors are not an identified method for wiring motor terminals? Or they are an identified method for wiring motor terminals, but shall not to be used for industrial machinery?
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- Wisconsin
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- PE (Retired) - Power Systems
If the concept if industrial machinery is ignored, twist-on wirenuts would not be allowed on 14AWG wiring to bathroom fans.
And that could explain why alot of the motors I see on industrial machinery have wire terminal blocks in the junction box as well...
texie
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- Fort Collins, Colorado
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- Electrician, Contractor, Inspector
As this illustrates, many NFPA publications are are "standards" as opposed to actual code such as the NEC or NFPA 72.
So I was in a bit of a hurry this morning and didn't read past that page in the manual, few pages further it goes into detail saying that "using wirenuts greatly increases the risk of fire and hazards to machinery and personnel" and if I use wirenuts to connect the motor it litteraly voids the warranty! I mean I've got my plan to use the insulated multitap like it suggests but I've literally seen every type of method to hook up a motor fail in one way or another if not done right. To say that wirenuts are the worst is kind of an overexaggeration. But if that's what they want....
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