UL SUBJECT 2261-2005 OUTLINE OF INVESTIGATION FOR CABLES FOR NETWORK-POWERED BROADBAND COMMUNICATIONS SYSTEMS (Issue 2)《网络供电式宽带通信系统用电缆调查大纲 发布编号 2》.pdf

1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULJuly 15, 2005BROADBAND CABLES PWIP1SUBJECT 2261OUTLINE OF INVESTIGATIONFORCABLES FOR NETWORK-POWERED BROADBAND COMMUNICATIONSSYSTEMSIssue Number: 2July 15, 2005Summary of TopicsThe Subject 2261 o

2、utline has been re-issued primarily to add Types BLand BLR to correlate ULs requirements for broadband cables with therequirements in the National Electrical Code.The UL Foreword is no longer located within the UL Standard. For informationconcerning the use and application of the requirements contai

3、ned in thisStandard, the current version of the UL Foreword is located onULStandardsInfoNet at: http:/ 2005 UNDERWRITERS LABORATORIES INC.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULJULY 15, 2005SUBJECT 22612No Text on This PageUL COPYRIGH

4、TED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULCONTENTSINTRODUCTION1 Scope .52 Units of Measurement .73 References .8CONSTRUCTION4 Materials .85 Conductors .85.1 Size and metal .85.2 Stranding 95.3 Size verification 95.4 Nominal diameter 115.5 Continuit

5、y 115.6 Joints 115.7 Metal coating .116 Conductor Insulation .126.1 Material and application 126.2 Properties 156.3 Thicknesses 177 Coaxial Members 218 Electromagnetic Shields 219 Optical-Fiber Members .2210 Binders 2311 Core Wrap .2312 Fillers .2313 Cable Assembly 2314 Overall Cable Jacket 2414.1 M

6、aterial, application, properties, and thicknesses .2414.2 Repairs and damage .2414.3 Thicknesses .2515 Cable Temperature Rating .2716 Metal Covering (Armor) 2816.1 General .2816.2 Smooth metal sheath .2916.3 Welded and corrugated metal sheath .3016.4 Extruded and corrugated metal sheath 3016.5 Inter

7、locked armor .3017 Jacket over Armor 32PERFORMANCE18 Continuity Test of Conductors and Shields .3219 D-C Resistance Test of Conductors .3320 Dielectric Tests of Conductor Insulation .3920.1 Alternative and required tests 3920.2 Spark test before cable assembly 4020.3 Dielectric voltage-withstand tes

8、t after cable assembly .4021 Heat Shock Test 42JULY 15, 2005 SUBJECT 2261 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL22 Deformation Test .4423 Cold Bend Test of Conductor Insulation .4724 Cold Bend Test of the Complete Cable 4925 Sunligh

9、t Resistance Tests .5026 Cold Impact Test .5127 Shrinkback Test of Thermoplastic Conductor Insulation 5228 Crushing Tests of Underground Cables 5329 Mechanical Water Absorption Test of Conductor Insulation in Underground Cables .5530 Test for Insulation Resistance at 60.0F (15.6C) .5631 Method of Te

10、st and Calculation for Determining a Column of Multiplying Factors for AdjustingInsulation-Resistance Readings to 60.0F (15.6C) from Another Room Temperature .5932 Test for Crushing Resistance of Conductor Insulation .6133 Smoke and Flame Testing of Plenum Cables 6234 Flame Testing of Riser Cables .

11、6335 Alternative Flame Tests of General-Purpose Cables 6335.1 Choice of test by the manufacturer .6335.2 Changes in construction 6435.3 UL test 6435.4 FT4/IEEE 1202 test 6536 Smoke Testing of Limited-Smoke Riser and General-Purpose Cables .6537 Flame Testing for Limited-Use Cables .6638 Copper Sulph

12、ate Test of Zinc Coating on Steel Strip for and from Interlocked Steel Armor . .6639 Tension Test of Interlocked Steel or Aluminum Armor .6840 Flexibility Test of Armor .7141 Durability Test of Ink Printing .73MARKINGS42 Colors .7343 Legibility of Printing .7344 Cable Markings .7344.1 Repetition int

13、ervals .7344.2 Items to be marked .7444.3 Means of marking 7645 Tag, Reel, and Carton Markings 7746 Multiple Markings .7747 Date of Manufacture 78JULY 15, 2005SUBJECT 22614UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULINTRODUCTION1 Scope1.1

14、This outline states basic construction, test, and marking requirements for the safety of electrical andelectrical/optical fiber cables that are for use in network-powered broadband communications systems asspecified in Article 830 and other applicable parts of the National Electrical Code (NEC), ANS

15、I/NFPA 70.These cables (broadband cables) are for use as fixed wiring within and between buildings and are alsofor service and drop use entering buildings and terminating at network interface units, which convert thebroadband signal to its component voice, video, data, and interactive-service signal

16、s for distribution by thecables referenced in 1.10 (a) (e). Broadband cables are insulated for 300 volts (no marking) and are ofthe specific types and voltage ratings described in (a) and (b).a) LOW-POWER CABLES Types-BL, BLP, BLR, BLU, and BLX are low-power cables. Thesetypes are for 0 100 volt low

17、-power circuits and are rated and marked 100 volts or 100 V.These cables are intended to be installed in accordance with 830.154 in the NEC.b) MEDIUM POWER CABLES Types BM, BMR and BMU. These types are for 0 150 voltmedium-power circuits and are rated and marked 150 volts or 150 V. These cables arei

18、ntended to be installed in accordance with 830.151 in the NEC.1.2 Broadband cables are single and multiple coaxial cables for carrying network power as well assignals, and are also multiple-member cables consisting of any combination of one or more coaxial oroptical-fiber members, or both, for netwo

19、rk signals, with two or more individual, paired, or groupedinsulated circuit conductors for network power and none, one, or more insulated or bare conductor(s) fornetwork grounding. Excluded constructions are described in 1.7 1.9 and 13.2. Broadband cables are flator round. Electrically nonconductiv

20、e material separates each optical-fiber member from the rest of thecable.1.3 Cables of materials that qualify for temperatures above 60C (140F) are marked with a temperaturerating of 75, 90, 105, 125, 150, 200, or 250C (167, 194, 221, 257, 302, 392, or 482F). Temperaturemarking is not required for c

21、ables that qualify for a temperature rating of 60C (140F). See 44.2.1(e) forthese markings.1.4 A cable that contains one or more electromagnetic shields other than the outer conductors of coaxialmembers (see 8.1 8.3 for constructions) either is not marked to indicate the presence of such shieldingor

22、 the cable bears the designation shielded on the tag and on the overall cable jacket or legible throughthe jacket see 44.2.1(c) for this marking.1.5 Optical fibers in a cable carry energy at potentially injurious levels so a tag, reel, or carton markingrequires systems using optical fibers to comply

23、 with national safety standards see 9.3 and 45.1(c).Where there are conductive parts in an optical-fiber member or in a group of such members, a tag marking45.1(d) indicates the presence of these parts.1.6 The following describes the flame or smoke and flame testing of cables. These tests do notinve

24、stigate the toxicity or corrosivity of the products of combustion or decomposition of the cablematerials.a) PLENUM CABLES All Type BLP cables are tested for smoke and flame characteristics asspecified in Smoke and Flame Testing of Plenum Cables, Section 33, which applies the methoddescribed as the N

25、ational Fire Protection Association Standard Method of Test for Flame Traveland Smoke of Wires and Cables for Use in Air-Handling Spaces, ANSI/NFPA 262. A cable thatcomplies is judged to be fire-resistant by virtue of this test damaging less than 5 feet (152 cm)JULY 15, 2005 SUBJECT 2261 5UL COPYRIG

26、HTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULof cable. A cable that complies is judged to be low-smoke-producing by virtue of this testshowing a peak optical smoke density of 0.50 or less and an average optical smoke density of0.15 or less.b) RISER C

27、ABLES Jacketed Type BLR and BMR cables are tested for flame-propagationcharacteristics as specified in Flame Tesing of Riser Cables, Section 34, which applies themethod described as the Standard Test for Flame-Propagation Height of Electrical and Optical-Fiber Cables Installed Vertically in Shafts,

28、UL 1666. A cable that complies is judged not capableof carrying fire from floor to floor by virtue of this test damaging less than 12 feet (366 cm) ofcable and temperatures measured at a height of 12 feet (366 cm) not exceeding 850.0F(454.4C).c) GENERAL-PURPOSE CABLES Jacketed Type BL and Type BM ca

29、bles are judged to beresistant to the spread of fire by virtue of their compliance with one of the two 70,000 Btu/h(20.5 kW) vertical-tray flame tests specified in Alternative Flame Tests of General-PurposeCables, Section 35. The cable manufacturer chooses one of the following tests, with smokemeasu

30、rements included see (d) only where a rating for limited smoke is also to be established.1) THE UL TEST REFERENCED IN 35.3.1 35.3.3 This test applies the methoddescribed as the UL Flame Exposure (smoke measurements are not applicable) in theStandard for Vertical-Tray Fire-Propagation and Smoke-Relea

31、se Test for Electrical andOptical-Fiber Cables, UL 1685. For compliance, this test damages less than 8 feet (244cm) of cable.2) THE FT4/IEEE 1202 TEST REFERENCED IN 35.4.1 This test applies the methoddescribed as the FT4/IEEE 1202 Type of Flame Exposure (smoke measurements arenot applicable) in the

32、Standard for Vertical-Tray Fire-Propagation and Smoke-ReleaseTest for Electrical and Optical-Fiber Cables, UL 1685. This test differs from the UL testin failure criteria, burner angle, and loading (a greater number of cable lengths areused, with small cables bundled, and the spacing between cables o

33、r bundles is limited).For compliance, this test damages less than 150 cm (59 inches) of cable. A cable thatcomplies either is not marked or it bears the designation FT4/IEEE 1202 or FT4legible on or through the outer surface or on a marker tape see marking in 44.2.1(i).e) OUTDOOR UNDERGROUND CABLES

34、Type BMU, and BLU cables are not flame orsmoke and flame tested.f) LIMITED-USE CABLES Jacketed Type BLX cables are tested as specified in FlameTesting of Limited-Use Cables, Section 37, which applies the method described as the VW-1(Vertical-Specimen) Flame Test in Section 1080 of UL 1581. A cable t

35、hat complies is judgednot capable of conveying flame along its length or to combustible materials in its vicinity. Asindicated in the last sentence of 37.2, a cable that complies is not marked VW-1.1.7 These requirements do not cover cables consisting of a single insulated conductor.1.8 These requir

36、ements do not cover cables containing multiple insulated conductors unless the cablesalso contain one or more coaxial or optical-fiber member(s) or both.JULY 15, 2005SUBJECT 22616UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL1.9 These requir

37、ements do not cover cables that contain only optical fibers. Optical-fiber cables withoutelectrical conductors are covered in the Standard for Optical Fiber Cable, UL 1651.1.10 These requirements do not cover power cables, cables for electric-light or control circuits, cables forClass 1 circuits, or

38、 the following cables specified NEC 830.3(D) for network interface unit output circuits:a) Communications cables (CM types), which are covered in the Standard for CommunicationsCables, UL 444.b) Community-antenna television cables (CATV types), which are covered in the Standard forCommunity-Antenna

39、Television Cables, UL 1655.c) Optical-fiber cables without electrical conductors (OF types) which are covered in theStandard for Optical Fiber Cable, UL 1651.d) Cables for Class 2 or Class 3 circuits (CL types), which are covered in the Standard forPower-Limited Circuit Cables, UL 13.e) Cables for p

40、ower-limited fire-alarm circuits (FPL types), which are covered in the Standardfor Cables for Power-Limited Fire-Alarm Circuits, UL 1424.1.11 These requirements do not cover cables for use as a CSA type(s), an appliance wire (see theStandard for Appliance-Wiring Material, UL 758), or an additional N

41、EC type(s). However, as indicated in46.2, the CSA, AWM, and additional NEC designations and ratings (including voltage markings) areadditions to the markings for cables that qualify under this outline (SU 2261) and also qualify as one ormore cables/wires under the CSA requirements, the requirements

42、in UL 758, and/or the requirements forthe additional NEC type(s).1.12 Broadband cables shall comply in all respects with the applicable requirements for construction, testperformance, and markings.2 Units of Measurement2.1 In addition to being stated in the inch/pound units that are customary in the

43、 USA, each numericalrequirement in this outline is also stated in units that make the requirement conveniently usable incountries employing the various metric systems (practical SI and customary). Equivalent although notexactly identical results are to be expected from applying a requirement in USA

44、or metric terms.Equipment calibrated in metric units is to be used when a requirement is applied in metric terms.JULY 15, 2005 SUBJECT 2261 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL3 References3.1 Wherever the designation UL 1581 is us

45、ed in this outline, reference is to be made to the designatedpart(s) of the Reference Standard for Electrical Wires, Cables, and Flexible Cords, UL 1581.3.2 Any undated reference to a code or standard appearing in the requirements of this outline shall beinterpreted as referring to the latest editio

46、n of that code or standard.CONSTRUCTION4 Materials4.1 Each material in a cable shall be applicable for the use.4.2 Each material used in a cable shall be compatible with all of the other materials used in the cable, ora positive means of achieving separation shall be employed. See 4.3.4.3 TPE materi

47、als of a styrenic type and the plasticizers in PVC and SRPVC are candidates forincompatability wherever the TPE and PVC touch one another in a cable (the plasticizers are drawn outleaving the vinyl porous). A positive means such as a separator or other intervening material shall beemployed to make c

48、ertain that there is no contact between styrenic TPE in a cable and any PVC andSRPVC in the same cable. Other combinations of material that are candidates for incompatability in acable are as yet not identified.5 Conductors5.1 Size and metal5.1.1 The center conductor of each coaxial member shall be

49、24 8 AWG in a medium-power cable and28 8 AWG in a low-power cable. Each center conductor shall be round and, as specified in (a) (f),solid or stranded and of the indicated metal (see also Metal Coating, Section 5.7):a) SOFT-ANNEALED COPPER that complies with the American Society for Testing andMaterials Standard Specification for Soft or Annealed Copper Wire, ASTM B 3. Solid orstranded. See Tables 19.1 and 19.2 for maximum resistance.b) MEDIUM-DRAW