| Author |
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Robert R Kircher, Jr.
Guest
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 Posted:
Tue Dec 14, 2004 10:54 pm Post subject:
Help finding building code guidlines for Network and Telepho |
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Can anyone point me in the right direction? I need to find, hopefully
online, guidelines or building codes regarding network and telephone wiring
in a commercial space in Alexandria City VA.
I'm assuming I need to run Plenum wiring in the drop ceilings but I need to
know what else I may need to do or look out for.
Any help would be greatly appreciated.
--
Rob |
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Dmitri(Cabling-Design.com
Guest
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| Posted:
Tue Dec 14, 2004 11:24 pm Post subject:
Re: Help finding building code guidlines for Network and Tel |
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Robert R Kircher, Jr. wrote:
| Quote: | Can anyone point me in the right direction? I need to find, hopefully
online, guidelines or building codes regarding network and telephone
wiring
in a commercial space in Alexandria City VA.
I'm assuming I need to run Plenum wiring in the drop ceilings but I
need to
know what else I may need to do or look out for.
Any help would be greatly appreciated.
|
The cabling installation is going to be governed by an electrical code. In
VA it is the National Electrical Code in particular. The best strategy
would be to call your municipality (your project location's municipality
rather), get through to the fire marshal’s office and ask them what
edition of NEC their inspectors have for field use. The NEC 2005 has just
been published (publishes every three years), but inspectors would not use
the most recent edition. Sometimes it's even still 1999 edition. Then you
can go online (Amazon?) and get yourself a copy.
--
Dmitri Abaimov, RCDD
http://www.cabling-design.com
Cabling Forum, color codes, pinouts and other useful resources for
premises cabling users and pros
http://www.cabling-design.com/homecabling
Residential Cabling Guide
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comp.dcom.cabling - 917 messages and counting!
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Sonco
Guest
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| Posted:
Wed Dec 15, 2004 2:38 pm Post subject:
Re: Help finding building code guidlines for Network and Tel |
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Why would you assume you need plenum ?
"Robert R Kircher, Jr." <rrkircher@hotmail.com> wrote in message
news:1oWdnUmdNpZ_tSLcRVn-vg@giganews.com...
| Quote: | Can anyone point me in the right direction? I need to find, hopefully
online, guidelines or building codes regarding network and telephone
wiring
in a commercial space in Alexandria City VA.
I'm assuming I need to run Plenum wiring in the drop ceilings but I need
to
know what else I may need to do or look out for.
Any help would be greatly appreciated.
--
Rob
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David R. Miller
Guest
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| Posted:
Wed Dec 15, 2004 10:58 pm Post subject:
Re: Help finding building code guidlines for Network and Tel |
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Robert,
Many jurisdictions use the National Electrical Code, and in that
publication Article 800 covers both telephone and ethernet cabling
safety practices.
Your local Building Department can tell which codes are used in your city.
If the NEC is used, then you need to read Article 300.22, which covers
"other spaces handling environmental air", which is how drop ceilings
are described in the NEC. When in doubt, however, use plenum rated
cable, which should be marked CMP.
Robert R Kircher, Jr. wrote:
| Quote: | Can anyone point me in the right direction? I need to find, hopefully
online, guidelines or building codes regarding network and telephone wiring
in a commercial space in Alexandria City VA.
I'm assuming I need to run Plenum wiring in the drop ceilings but I need to
know what else I may need to do or look out for.
Any help would be greatly appreciated.
|
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| Back to top |
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Guest
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| Posted:
Wed Dec 29, 2004 2:12 am Post subject:
Re: Help finding building code guidlines for Network and Tel |
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David,
Our basement has a drop ceiling, but I don't think it is handling
environmental air. Our HVAC ducts do that, both ways. I am a bit
confused by this provision in 300.22(c) as to why I wouldn't be allowed
to run NM cables along the long side of the joists, but perpendicular
would be o.k. What does "environmental air" exactly mean? There is
air between the joists (as opposed to insulation), but what makes it
environmental? The original wiring I have there is all NM, but it is
also 28 years old. Where can I find some more clarifying information?
I have the Illustrated Guide to the NEC 2002, but it sheds no light on
what "handling environmental air" does and does not mean. I don't want
to go through the hassle of installing conduit, but I don't want to
fail inspection either.
Thanks,
Thomas
David R. Miller wrote:
| Quote: | If the NEC is used, then you need to read Article 300.22, which
covers
"other spaces handling environmental air", which is how drop ceilings
are described in the NEC. When in doubt, however, use plenum rated
cable, which should be marked CMP. |
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Justin Time
Guest
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| Posted:
Thu Dec 30, 2004 12:56 am Post subject:
Re: Help finding building code guidlines for Network and Tel |
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The term "environmental air" can be loosely defined as air that is
circulated/recirculated for controlling the environment of a space. If
the air above the dropped ceiling is cycled through the HVAC, then it
is environmental air. If it is static, that is not circulated, then it
is not evironmental air.
As you have stated there are ducts in your ceiling that bring in
heated/cooled air and other ducts that return air to the HVAC system,
then the air above the ceiling, in your case, is not considered
environmental. Is the mud a little less opaque? |
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