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2.0 Cable Ratings (Data Communications Cabling)




Description

This article is from the Data Communications Cabling FAQ, by Peter Macaulay pmac@fox.nstn.ca with numerous contributions by others.

2.0 Cable Ratings (Data Communications Cabling)

(Or What Are Those Codes Printed On My Cables?)
In the Hollywood movie "Towering Infernio" (starring O.J.Simpson)
a fire spread from floor to floor using the building cables. This
will not happen again (we hope) since everyone is using fire rated
cables! These are important specifications if you are responsible
for defining a cable installation.

If interfloor penetrations are properly "firestopped", the
cables can burn, but the fire will not pass the firestopping.

UL-910, FT-4 and FT-6 say nothing about the type or volume of toxic
combustion products produced. All they cover is performance on a
flamespread test.

THIS DOCUMENT IS A GUIDELINE ONLY -- SEEK PROFESSIONAL
ADVICE, CHECK LOCAL BUILDING CODES AND APPLICABLE STANDARDS.

The US National Fire Protection Association (NFPA) revises the
National Electrical Code (NEC) every 3 years. The NEC defines
classifications of cable as per UL tests.

The Canadian Standards Association (CSA) defines Premise Communication
Cord (PCC) standards for physical wire tests. These are printed
on the cable as CSA-PCC-FT6.

FT4 = Flame Test 4 is described in CSA C22.2 0.3-1992
FT6 = Flame Test 6 is described in NFPA 262-1985 and ULC S102.4
Physical Wire Tests C22.2 214-M-1990. These CSA documents can
be ordered from the CSA. See sources below.

<<<Any comments on standards from other parts of the world?>>>

 

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