Need help fiding a code

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tazz3069

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I have another contractor not following the code. Actually, they do not know the code. I am currently working in a high rise codo project in Las Vegas. The AV company that is working on the job are not following the rules. They are installing Flex on bare floor. These floors still need to have concrete installed The flex will be incased in the concrete. I found that code. I need to find in the book where it states that plastic boxes, plastic cut in rings are not permitted. The company insist that they are doing the job right. They have always pasted inspections. I know this for a fact because I did not pass an inspection because of ths company. Can someone help me find the cde for the boxes.
Mark
 
I need to find in the book where it states that plastic boxes, plastic cut in rings are not permitted.
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Why do you feel that plastic boxes and plastic cut in rings are prohibited from being installed in a high rise condo project?

You stated "The AV contractor" so I am assuming that they are running audio, phone, and other "low voltage" systems, is this correct?

Maybe if you could give me some more information on how the plastic boxes are being used I could be of more help.

Chris
 
Are you talking about the plastic boxes being buried within the conduit, or just being plastic?
 
For the plastic boxes, have them supply you the manufacturer's spec sheet on the boxes that they are using are allowed to be installed in concrete.

As for the Flex, look in Chapter 3-ish since I don't have my code book or whatever section deals with wiring/conduit systems.
 
The smurf tube can be installed in concrete I know, but I'm not sure about the boxes. Never had anyone try before. Now that's "assuming" we're just talking about a plain old plastic box since they do make Pvc floor boxes.
 
The problem I see here is that LV Guys dont have to follow the code... because there is no electrical code for low voltage. I owned a company that did low voltage wiring for 7 years. It is common to use smurf tube in cement, and the orange 'carflex' everywhere else. It is actually a good install because if you have conduit to all the drops, it is easier to upgrade / expand in the future. Just about everything we used was PVC, with the exception of a metallic mud ring once in a while when we ran out of nail on boxes.

Just my $.02 worth,


~Matt
 
actually there are codes for low voltage installs, but speaking for myself, I don't make to big of a deal out of it until some LV guy starts to give me lip about something. :smile:
 
I do know that you can place smurf tubing in concrete. What I am talking about is that they are using regular 3/4" flex and not smurf tubing. The flex ends at the drywall and the cable continues. They are also using plastic cut in rings and not 4s boxes. The reason I am bring this up is because I call for inspection on another job and did not pass because of these issues. The best thing about it was that it is the same AV contractor. I found Articl 350-5 in regards to uses not permitted (Flexible Metal Conduit). I just can not find the section that talks about the boxes. Mind you The project is on the 40th floor. I had another contractor who used Romex and plastic cut in boxes and again I did not pass my rough electrical because of it.
 
Cowboyjwc,
The towers I work in are built out of concrete and metal stud. The inspector follow the code nomater if it is speaker wire or it is a 200 amp feed for a panel
 
tazz3069 said:
IThe company insist that they are doing the job right. They have always pasted inspections. I know this for a fact because I did not pass an inspection because of ths company.
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tazz3069 said:
I had another contractor who used Romex and plastic cut in boxes and again I did not pass my rough electrical because of it.
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I am confused :-?

What is YOUR role is all of this?

How are the actions of a seperate EC (or any contractor for that matter) affecting your inspections?
 
348.12 Uses Not Permitted. (6) Underground or embedded in poured concrete or aggregate.

314.23(G) Enclosures in Concrete or Masonry. An enclosure supported by embedment shall be identified as suitably protected from corrosion and securely embedded in concrete or masonry.

314.27(C) Floor Boxes. Boxes listed specifically for this application shall be used for receptacles located in the floor.
 
TOOL_5150 said:
.. because there is no electrical code for low voltage.
~Matt
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True. The NEC does not use the term low voltage. And if you have a low voltage system that exceeds the limits of Art 725 Part II or III, then it has to be wired as a chapter 3 system.
Now, the NEC does have rules for limited energy, such as Art 726, 760, 770, 800, 810, 820.
Keep in mind low voltage can be high current, and can cause fires or shock.
Does your state not regulate "low voltage" installation and licensing, or is it just the installers don't know?
 
tazz3069 said:
I do know that you can place smurf tubing in concrete. What I am talking about is that they are using regular 3/4" flex and not smurf tubing. The flex ends at the drywall and the cable continues. They are also using plastic cut in rings and not 4s boxes. The reason I am bring this up is because I call for inspection on another job and did not pass because of these issues. The best thing about it was that it is the same AV contractor. I found Articl 350-5 in regards to uses not permitted (Flexible Metal Conduit). I just can not find the section that talks about the boxes. Mind you The project is on the 40th floor. I had another contractor who used Romex and plastic cut in boxes and again I did not pass my rough electrical because of it.
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Why are your inspections failing because of a different contractor's violations?
 
LawnGuyLandSparky said:
Why are your inspections failing because of a different contractor's violations?
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Around here they do the same. If the heating contractor wires his thermostat wire to an outdoor unit without sleeving it in carflex or something to protect it, then the electrical final will be held up because it falls under the electrical code not HVAC.
 
If the heating contractor wires his thermostat wire to an outdoor unit without sleeving it in carflex or something to protect it, then the electrical final will be held up because it falls under the electrical code not HVAC.
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That would be like giving the guy driving the car in front of me a ticket because I was speeding. I'd be in court in about 10 seconds if my install was turned down because of something done by another contractor.
Don
 
Dennis Alwon said:
Around here they do the same. If the heating contractor wires his thermostat wire to an outdoor unit without sleeving it in carflex or something to protect it, then the electrical final will be held up because it falls under the electrical code not HVAC.
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Here we would laugh that off and move on.:grin:

Other contractors actions are not my problem. It is not uncommon for us to work on jobs with multiple contractors doing electrical work.

As an example I called for a ceiling inspection, the inspector questioned me about a bunch of low voltage wiring I said it's not mine it's the security contractors, but the guy you want to talk to is over in that room. The inspector found that person, asked him why no permit was pulled for that work and then asked for a license which the person did not have.

I got my work signed off, the security company paid some hefty fines and hired us to finish the work. :grin:
 
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