You can only use this clause if your equipment will not be mounted above other equipment in the telco frame. So basically, if your equipment occupies the entire 7' or 11' foot high frame or your equipment is "always" on the bottom, you could uses this exemption.
Be cognizant of the consequences of not having a fire enclosure for the "shelf" or "Frame" level burn test in GR-63-CORE. Jim Jim Wiese NEBS Project Manager/Compliance Engineer ADTRAN, INC. 901 Explorer Blvd. P.O. Box 140000 Huntsville, AL 35814-4000 256-963-8431 256-963-8250 fax jim.wi...@adtran.com > ---------- > From: Collins, Jeffrey[SMTP:jcoll...@ciena.com] > Sent: Wednesday, September 29, 1999 5:10 PM > To: 'emc-p...@majordomo.ieee.org' > Cc: Collins, Jeffrey > Subject: RE: Fire Enclosure Construction > > > > Group, > > Any experience with UL1950 4.4.6 (Fire Enclosure Construction) "For > Central > Office, RBOC's, Telecom equipment" > > " Stationary equipment intended for use in a Restricted Access Location > and > to be mounted on concrete floor or other noncombustible surface need not > be > provided with a bottom enclosure if marked "Suitable for mounting on > concrete or other noncombustible surfaces only." > > Has anyone used this clause to avoid designing a bottom enclosure? > > Could doing this cause any Bellcore / NEB issues? > > Please let me know if you've had any negative feedback (national codes, > customer requirements etc.) by doing this. > > Thanks, > > Jeff Collins > > Ciena CSD (Formerly Lightera Networks) > MTS, Compliance Engineer > jcoll...@ciena.com > www.ciena.com > > > > > > --------- > This message is coming from the emc-pstc discussion list. > To cancel your subscription, send mail to majord...@ieee.org > with the single line: "unsubscribe emc-pstc" (without the > quotes). For help, send mail to ed.pr...@cubic.com, > jim_bac...@monarch.com, ri...@sdd.hp.com, or > roger.volgst...@compaq.com (the list administrators). > > > --------- This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
