UL 209 UL Standard for Safety for Cellular Metal Floor Raceways and Fittings
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UL 209 Document Information:
Title
UL Standard for Safety for Cellular Metal Floor Raceways and Fittings
Underwriters Laboratories Inc.
Publication Date:
Nov 23, 2005
Scope:
These requirements cover cellular metal floor raceway systems
intended to be installed as an integral part of the building
structure and constructed for the installation of wires and cables
in accordance with the National Electrical Code (NEC), NFPA 70.
These requirements do not cover rigid or flexible conduit,
surface metal raceways and fittings, underfloor raceways and
fittings, or other products of a similar nature.
These requirements do not cover the structural aspects or
properties of cellular metal floor units – their load-carrying and
fire-resistant capabilities or their physical dimensions with
relation to mechanical strength.
Cellular metal floor raceways consist of the hollow spaces in
cellular metal floors and associated fittings that serve as
enclosures for wires and cables. A cell is a single enclosed
tubular space in a cellular floor unit with a longitudinal axis
parallel to the longitudinal axis of the floor unit. Header duct is
a transverse wire raceway that, by providing access to
predetermined cells of a cellular metal floor, facilitates the
installation of wiring from a distribution center to the cells.
Cellular metal floor raceway is always installed with concrete
poured over the raceway and may be installed on top of a concrete
slab.
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