Carlon Structured Cable Management Systems Handbook - Low Res - Manual (Page 63)

61
The other panels did not agree with Panel 3 and have
adopted language to require abandoned cables to be
removed. Section 90.3, Code Arrangements, allows
Chapters 5, 6 and 7 to supplement or modify the
general rules found in Chapters 1 through 4 for
particular conditions. Chapter 8 covers communications
systems and is not subject to the rules of Chapter 1
through 7 except where the requirements are
specifically referenced in Chapter 8.
Each Article adopted a definition of abandoned cables,
and the rule for removal. For example, Article 770,
Optical Fiber Cables and Raceways, added the follow-
ing definition to 770.2 Definitions:
Abandoned Optical Fiber Cable. Installed optical
fiber cable that is not terminated at equipment other
than a connector and not identified for future use with
a tag.
The rule was added to 770.3(A):
(A) Spread of Fire or Products of Combustion. The
requirements of 300.21 for electrical installations shall
also apply to installations of optical fiber cables and
raceways. The accessible portion of abandoned optical
fiber cable cables shall not be permitted to remain.
Several organizations such as BICSI, TIA and NECA are
working on designing a “Tag” that would be accept-
able for identifying a cable intended for future use.
Article 645 for Information Technology Equipment,
indicates that all abandoned cables installed under
raised floors shall not be permitted to remain unless
contained in metal raceways. A “Tag” indicating future
use for abandoned cables will not be considered an
option to allow these cables to remain.
Architects, designers, engineers and contractors will
need to take the abandoned cable rule into account
when designing new buildings and retrofitting older
buildings. The easiest way to remove and/or replace a
cable is to have it installed in a raceway.
Each of these articles defines the raceways acceptable
for use in a Plenum. Those raceways defined in Section
300.22, which consists of metal raceways, are permit-
ted to be used with each of these cable installations.
Section 645.5(D)(2) expands the types of raceways per-
Gross Automation (877) 268-3700 · www.carlonsales.com · [email protected]