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The NEC does not directly address in issue of supporting 'distances' for communications cable in the horizontal position. However read Article 90.4, because this is often times overlooked. This points you to the correct answer to your question: Look here
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Recently, an issue came up with spacing (ceiling beams are 6' o/c) so I decided to actually open the NEC and read about it. I couldn't seem to find anything referencing distance between supports, other than "properly supported".
So...what gives? Is there an actual code section that defines "properly supported" or have the inspectors been misinformed all these years?
They have been BSing you all these years. There is nothing in the NEC that addresses support other than keep it off the ceiling grid and what you can't support it from- like other line voltage wiring, conduit, sprinkler pipes, etc. Next time an inspector gives you his opinion, ask him to quote you the Code section where it is written. Might help if you have a code book in your hand and are opening it while you ask. :p
-Hal
CALIFORNIA PROPOSITION 65 WARNING: Some comments made by me are known to the State of California to cause irreversible brain damage and serious mental disorders leading to confinement.
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In Oregon they make it easy to view the: Oregon Electrical Speciality Code This document legally overrides the NEC.
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We cabled a 14 story building and danced to the tune of the local municipal inspector. We had our BCISI engineers pulling their hair out with all the off the wall changes and requirements this guy was coming up with. BUT,we had no choice, local rules applied!
Forty six years and still fascinated with Telecommunications!
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However read Article 90.4, because this is often times overlooked.
Not overlooked, just not relevant to what we are talking about. The AHJ is responsible for interpreting the Code, yes. But he can't make up his own rules.
we had no choice, local rules applied!
Those local rules have to be in writing and provided to you. Again, the AHJ can't just make things up.
-Hal
CALIFORNIA PROPOSITION 65 WARNING: Some comments made by me are known to the State of California to cause irreversible brain damage and serious mental disorders leading to confinement.
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RIP Moderator-Mitel, Panasonic
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"But he can't make up his own rules." ------------------------------------------------------------------------------------------------------ But, until you get a rep as an NEC 'STICKLER', how much spare time do you have to attend appeals, and how badly do you want your work inspected with a fine tooth comb. Complying with demands for manufacturers spec sheets on each and every item you install for the job will eat up your spare time and 'innocently' hold up the inspectors approval. Tread very lightly.
When I was young, I was Liberal. As I aged and wised up, I became Conservative. Now that I'm old, I have settled on Curmudgeon.
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Originally posted by hbiss: However read Article 90.4, because this is often times overlooked.
Those local rules have to be in writing and provided to you. Again, the AHJ can't just make things up.
-Hal A.H.J.: The National Fire Protection Agency (NFPA), which uses the term throughout their codes and standards, has officially defined it as “the organization, office, or individual responsible for approving equipment, materials, an installation, or a procedure.†Oregon Administrative Rules 918-305-0100 Adoption of Oregon Electrical Specialty Code (1) Effective April 1, 2011, the 2011 Oregon Electrical Specialty Code consists of the following: (a) 2011 Edition of the NFPA 70, National Electrical Code (NEC), and further amended by the division in Table 1-E; (b) 2007 Edition of the IEEE C2-2007, National Electrical Safety Code (NESC); and (c) The electrical provisions of the Oregon Elevator Specialty Code adopted in OAR 918-400-0455. (2) In the event of a conflict between the NEC and NESC requirements, the NEC requirement, as amended in subsection (1)(a) of this rule, applies. (3) As used in this rule: (a) “ANSI†is the American National Standards Institute; (b) “ASME†is the American Society of Mechanical Engineers; (c) “IEEE†is the Institute of Electrical and Electronics Engineers; and (d) “NFPA†is the National Fire Protection Association. And in their "interpertation" they can legally tell you the distance required.
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Originally posted by dexman: Can the inspector produce documentation to back up his claim? If he says that it is listed in the NEC, he should be able to tell you where to find it. Nah, you don't step on Superman's cape around these parts. One little check mark in the "failed" column and your life is hell.
D. Ocean Miami, FL
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Originally posted by Professor Shadow: The NEC does not directly address in issue of supporting 'distances' for communications cable in the horizontal position.
However read [b]Article 90.4, because this is often times overlooked. This points you to the correct answer to your question: Look here [/b] Article 90.4 in the NEC talks about local rules. Couldn't find anything in your link (FL Building Codes)about structured cabling)... :shrug:
D. Ocean Miami, FL
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If the inspector is going to flunk your work, he has to site the code. That's the way it works around here. Unfortunately (of fortunately) if you challenge the inspectors around here, more times than not,they'll just pass it. But in any event, the inspector has to point to the exact code that's being violated. I'm with Hal on this.
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