Use of NM Flexible Conduit

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IRCS

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On a recent high rise buiding inspection in Miami I ran into this mess. Does anyone see any problems? All NM Flex was recently installed and there was no electrical permit pulled.
 

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IRCS said:
On a recent high rise buiding inspection in Miami I ran into this mess. Does anyone see any problems? All NM Flex was recently installed and there was no electrical permit pulled.
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As long as it's in Miami I think it's ok. ;)


Roger
 
not permitted where: ambient temps exceed 122 degrees f. i bet it gets hotter than that up on that roof deck ? 362.12 (3) 2011 nec. and, where exposed to direct rays of the sun, unless identified as sunlight resistant 362.12 (8), 2011 nec :)
 
I think if you really added up the degrees of bend you may be over 360 but for the most part I am with John, ugly is not against the code.
 
it looks to be "supported" properly, Its ugly, but its also on the roof, so Id say not really a big deal. I would have elected to use some EMT though.
 
PEDRO ESCOVILLA said:
not permitted where: ambient temps exceed 122 degrees f. i bet it gets hotter than that up on that roof deck ? 362.12 (3) 2011 nec. and, where exposed to direct rays of the sun, unless identified as sunlight resistant 362.12 (8), 2011 nec :)
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I agree ambient temps could get hotter than that on the roof deck, at least they could here. Also,I have not seen any LFMC that was not marked sunlight resistant.
 
Roofs are the problem

Roofs are the problem

It's not just the electrical but the refrig. lines. Why can't engineers design roof supports into construction? As usual the electrician comes along and has to figure out what to do. Then the electrician becomes responsible for roof leaks. Now if the roof were on fire, the firemen would get tangled up in that melting mess. I bet the roof leak problem motivated this job, especially with a hurricane. That crap will blow away...
 
That stuff does not look like it is supported every 3' as required by 356.30-- I am assuming this is Carflex or LFNC
 
Now this is an example of work that any electrician would have to instinctively shy away from. Whether it is 100% code compliant or not, I wouldn't put my name on it. If I were an inspector, I would find any violation I could to void it. Dennis' suggestion about 3 feet, better not be 3' 1/4". 360 degrees of bends is also a good one to violate on. I would look really closely at wire temperature derating just to be a pain. And can they really get away with this amount of work without a permit? I might even go so far as to talk to the building management and make sure the work was done to their minimum requirements.


Boy that is wicked ugly! As we used to say in New England!
 
weressl said:
The galvanized 'straps' are improper supports, not designed for the purpose and vibration eventually cause it to cut into the NM and conductors.
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I have used metal straps for carflex for almost 30 years -- there should not be much vibration that far away. However with the sun heating the carflex it may make it more susceptible to the strap digging in.
 
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