Help finding building code guidlines for Network and Telephone wiring.
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Posted by Robert R Kircher, Jr. on December 14, 2004, 3:54 pm
Please log in for more thread options 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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Posted by Dmitri(Cabling-Design.com on December 14, 2004, 9:24 pm
Please log in for more thread options > 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 ------------------------------------- ##-----------------------------------------------## Article posted with Cabling-Design.com Newsgroup Archive http://www.cabling-design.com/forums no-spam read and post WWW interface to your favorite newsgroup - comp.dcom.cabling - 917 messages and counting! ##-----------------------------------------------## | |||||||||||||||||||
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Posted by Sonco on December 15, 2004, 7:38 am
Please log in for more thread options Why would you assume you need plenum ?
> Can anyone point me in the right direction? I need to find, hopefully
wiring
> online, guidelines or building codes regarding network and telephone > in a commercial space in Alexandria City VA.
to
> > I'm assuming I need to run Plenum wiring in the drop ceilings but I need > know what else I may need to do or look out for.
> > Any help would be greatly appreciated. > > -- > > Rob > > | |||||||||||||||||||
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Posted by David R. Miller on December 15, 2004, 12:58 pm
Please log in for more thread options This is a multi-part message in MIME format.
--------------010309050606080809010607 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit 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: > 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. > --------------010309050606080809010607 Content-Type: text/x-vcard; charset=utf-8; name="dave.vcf" Content-Transfer-Encoding: 7bit Content-Disposition: attachment; filename="dave.vcf" begin:vcard fn:David Miller n:Miller;David org:Viable Systems adr;dom:;;2465 Kingfield Way;San Jose;CA;95124 email;internet:drmiller@viable-systems.com tel;work:(408) 230-7940 tel;fax:(720) 834-9226 tel;home:(408) 356-7881 tel;cell:(408) 230-7940 x-mozilla-html:FALSE version:2.1 end:vcard --------------010309050606080809010607-- | |||||||||||||||||||
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Posted by on December 28, 2004, 4:12 pm
Please log in for more thread options 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: > 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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> online, guidelines or building codes regarding network and telephone
> wiring
> in a commercial space in Alexandria City VA.