 |
| Purchase Information |
| Use this form to request purchase information on UL online subscriptions. |
|
|
Document UL 1424 is offered by IHS as part of an online subscription. This subscription contains many documents on the same topic.
You may also purchase this document alone from the IHS Standards Store.
UL 1424 Document Information:
Title
UL Standard for Safety Cables for Power-Limited Fire-Alarm Circuits
Underwriters Laboratories Inc.
Publication Date:
Aug 5, 2005
Scope:
These requirements cover 60 - 250°C (140 - 482°F) single- and
multiple-conductor cables for
use as fixed wiring within buildings (some are also marked for direct
burial) principally for
power-limited fire-alarm circuits as described in Article 760 and
other applicable parts of the
National Electrical Code (NEC). Cables covered by these requirements
are:
a) Type FPLP (plenum cable),
b) Type FPLR (riser cable), and
c) Type FPL (cable for other than plenum and riser uses in general and
in trays), and
"Power-limited fire-alarm circuit cable" (cable for limited use).
The cables covered in these requirements are rated for 300 volts but
are not so marked. See
43.1(h).
A cable that contains one or more electromagnetic shields may be
surface marked or have a marker
tape to indicate that it is "shielded". A cable that contains one or
more optical-fiber members has
"-OF" supplementing the type letters and is marked in accordance with
44.1(e). A cable may consist
of or contain one or more coaxial members.
The overall jacket on a cable that has "sun res" or "sunlight
resistant" in a surface marking or on
a marker tape complies with a 720-h sunlight-resistance test.
A cable that has "dir bur", "direct burial", or "for direct burial" in
a surface marking or on a
marker tape complies with a 1000-lbf crushing test. Direct-burial
cable with wire armor, a metal
braid, interlocked metal armor, or a smooth or corrugated metal sheath
has a jacket over the metal
covering.
Smoke and fire considerations are as follows for the cables covered in
these requirements:
a) TYPE FPLP CABLE - Cable that is intended for installation in
accordance with section 760-82(d)
of the National Electrical Code (ANSI/NFPA 70) in a duct, plenum, or
other space used to transport
environmental air without the cable being enclosed in a raceway in
that space is to be tested for
smoke and flame characteristics in accordance with the National Fire
Protection Association
Standard Method of Test for Flame Travel and Smoke of Wires and Cables
for Use in Air-Handling
Spaces, ANSI/NFPA 262. A cable that complies exhibits a maximum
flame-propagation distance that is
not greater than 5 ft, 0 inch or 152 cm, a peak optical density of
smoke produced of 0.50 or less
(32 percent light transmission), and an average optical density of
smoke produced of 0.15 or less.
b) TYPE FPLR CABLE - Cable that is intended for use in vertical runs
in a shaft, or for
installations in which the cable penetrates more than one floor, as
specified in section 760-82(e)
of the National Electrical Code ANSI/NFPA 70. This cable is to be
tested for flame-propagation
characteristics in accordance with the Standard Test for Flame
Propagation Height of Electrical and
Optical-Fiber Cables Installed Vertically in Shafts, UL 1666. A cable
that complies has a
flame-propagation height less than 12 ft, 0 inch or 366 cm and
temperatures are 850.0°F
(454.4°C) or less at a height of 12 ft, 0 inch or 366 cm.
c) TYPE FPL CABLE - Type FPL cable complies with a 70,000 Btu/h (20.5
kW) vertical-tray flame test.
The cable manufacturer chooses one of the following tests:
1) THE UL TEST REFERENCED IN 23.2.1 - This paragraph applies the test
method described as the UL
Flame Exposure (smoke measurements are not applicable) in the Standard
Vertical-Tray
Fire-Propagation and Smoke-Release Test for Electrical and
Optical-Fiber Cables, UL 1685, to cable
that is surface marked or designated by a marker tape as "FPL". For
compliance, this test damages
less than 8 feet (244 cm) of cable.
2) THE FT4/IEEE 1202 TEST REFERENCED IN 23.3.1 - This paragraph
applies the test method described
as the FT4/IEEE 1202 Type of Flame Exposure (smoke measurements are
not applicable) in the Standard
Vertical-Tray Fire-Propagation and Smoke-Release Test for Electrical
and Optical-Fiber Cables, UL
1685. This test differs from the UL tests in loading (more cables are
used, with small cables
bundled, and the spacing between cables or bundles is limited), burner
angle, and failure
criterion. For compliance, this test damages less than 150 cm (59
inches) of cable. A cable that
complies either is not marked or it bears the designation "FT4/IEEE
1202" or "FT4" legible on or
through the outer surface or on a marker tape [see marking in
43.1(i)].
d) POWER-LIMITED FIRE-ALARM CIRCUIT CABLE - Cable that is surface
marked or designated by a marker
tape as "power-limited fire-alarm circuit cable" or as "power ltd fire
alarm cable" complies with
the VW-1 vertical-specimen flame test. The cable is not marked "VW-1".
As noted in 1.8, "power-limited fire-alarm circuit cable" is used with
protection such as raceway.
All other cables covered in these requirements are not required by the
NEC to be used in raceway
and are capable of use without the physical protection of raceway but
may be pulled into conduit or
installed in other raceway.
"Power-limited fire-alarm circuit cable" is used:
a) In nonconcealed spaces in which the exposed length of cable does
not exceed 10 ft or 3.05 m, and
b) In raceway.
These requirements do not cover cables that contain conductors for
electric-light, power, or Class
1 circuits. These requirements do not cover cables for Class 3 or
Class 2 power-limited circuits
(see the Standard for Power-Limited Circuit Cables, UL 13),
communications cables (see the Standard
for Communications Cables, UL 444), or cables for non-power-limited
fire-alarm circuits (NPLF
types).
These requirements do not cover the optical or other performance of
any optical-fiber member or
group of such members. See 8.3.
About IHS
IHS (NYSE: IHS) is a leading global provider of critical technical information, decision-support tools and related services in a number of industries including aerospace and defense, automotive, construction, electronics, and energy. IHS serves customers ranging from large governments and multinational corporations to smaller companies and technical professionals in more than 100 countries. IHS been in business for more than 45 years and employ more than 2,300 people around the world.
