0 what is the minimum bending radius for a cable 200

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19.0 What is the Minimum Bending Radius for a Cable? 20.0 Fiber Optic Cable 21.0 ISDN Cabling 22.0 Testing Unshielded Twisted Pair Cables 23.0 - 29.0 Not Used (Blank) 30.0 Sources of Additional Information --------------------------- Subject: 1.0 Cable Types Communications Cable: primarily for telephone cable Class 2 Cable: signaling cable primarily for data communications Riser: vertical shaft used to route cable between floors Plenum: Heating, Ventilation, Air Conditioning (HVAC) air return area -- mostly drop ceilings. Also below raised floors (where the underfloor area is used for ventilation). ------------------------------ Subject: 2.0 Cable Ratings (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.
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Data Communications Cabling FAQ Page 3 of 19 09/21/1999 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?>>> ------------------------------ Subject: 3.0 National Electrical Code (NEC) 1993 National Electrical Code Article 725, Class 2 725-38(b)1 CL2X Class 2 cable, limited use 725-38(b)1 CL2 Class 2 cable 725-38(b)2 CL2R Class 2 riser cable 725-38(b)3 CL2P Class 2 plenum cable Article 800 800-3(b)1 CMX Communications cable limited use 800-3(b)1 CM Communications cable 800-3(b)2 CMR Communications riser cable 800-3(b)3 CMP Communications plenum cable OFNP (Optical Fiber Nonconductive Plenum) OFNR (Optical Fiber Nonconductive Riser) ------------------------------ Subject: 4.0 Not Used (Blank) ------------------------------ Subject: 5.0 Specific Cable Classifications CMS, CL2X (Restricted Cable) must be enclosed in conduit, up to 10 feet exposed; must pass UL 1581 VW-1 test CM, CL2 (General Purpose Cable) for use in areas other than risers or plenums; must pass UL 1581 vertical tray test CMR, CL2R (Riser Cable) for cable in vertical shafts; must pass UL test method 1666 CMP, CL2P (Plenum Cable) for use in plenum areas (air ducts); must pass UL 910 test for smoke and flame spread ------------------------------ Subject: 6.0 Cable Conductors Cable conductor gauge is specified as AWG (American Wire Gauge).
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