I don’t have enough experience to quickly give the code reference from the NEC, UBC or UMC either for or against passive devices in risers. However, I can recommend a pair of other forums where the members may be able to give you an answer.
http://electrical-contractor.net/ http://forums.mikeholt.com/ The forums are not good places for getting answers to product safety questions, but they are good for electrical construction issues. Their members regularly work with the AHJs. Ted Eckert Compliance Engineer Microsoft Corporation [email protected] The opinions expressed are my own and do not necessarily reflect those of my employer. From: Peter Tarver [mailto:[email protected]] Sent: Friday, November 06, 2009 6:06 PM To: [email protected] Subject: nonelectrical equipment in risers Corrected Subject line (cut and paste error) On 6 Nov 2009 at 17:52, Peter Tarver wrote:Priority: normal > Cross-posted to the IEEE Electrical Safety Forum web > community. > > Consider a passive, unpowered (no electrical utilization) > fiber-optic distribution hub, stated by the manufacturer as > intended for installation in a riser (not a plenum, duct or > "other space for environmental air"). I've been told by an > NRTL, who was asked to evaluate the suitability for > installation in a riser, that this is prohibited, but the > arguments they use are related to environmental air spaces. > > In searching the NEC, not much is said about risers, except > for required cable flame ratings, and nothing that ties them > to environmental air spaces. I understood that risers could > not be used for environmental air spaces, based on the less > stringent requirements for flame spread and smoke developed > for riser cable, when compared to plenum cable. > > On the assumption that the riser is dimensionally large > enough to accommodate the hub (or anything else for that > matter) and the hub could meet the riser flame requirements, > is this a prohibited item in a riser? > > > Peter Tarver > > - > ------------------------------------------------------------ > ---- This message is from the IEEE Product Safety > Engineering Society emc-pstc discussion list. To post a > message to the list, send your e-mail to <[email protected]> > > All emc-pstc postings are archived and searchable on the web > at: http://www.ieeecommunities.org/emc-pstc Graphics (in > well-used formats), large files, etc. can be posted to that > URL. > > Website: http://www.ieee-pses.org/ > Instructions: > http://listserv.ieee.org/request/user-guide.html List rules: > http://www.ieee-pses.org/listrules.html > > For help, send mail to the list administrators: > Scott Douglas <[email protected]> > Mike Cantwell <[email protected]> > > For policy questions, send mail to: > Jim Bacher: <[email protected]> > David Heald: <[email protected]> > - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <[email protected]> All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc Graphics (in well-used formats), large files, etc. can be posted to that URL. Website: http://www.ieee-pses.org/ Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher: <[email protected]> David Heald: <[email protected]> - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <[email protected]> All emc-pstc postings are archived and searchable on the web at http://www.ieeecommunities.org/emc-pstc Graphics (in well-used formats), large files, etc. can be posted to that URL. Website: http://www.ieee-pses.org/ Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher <[email protected]> David Heald <[email protected]>
