请注意:此版本的所有临时修订版将在您购买时提供。限电火灾报警电路电缆SUL 14241范围1。1这些要求包括60-250°C（140-482°F）单芯和多芯电缆，主要用于建筑物内的固定布线（有些还标记为直埋），用于第760条和《国家电气规范》（NEC）其他适用部分中所述的限电火灾报警电路。这些要求涵盖的电缆包括:a）FPLP型（增压电缆）、b）FPLR型（立管电缆）和C）FPL型（除增压和立管外的一般用途和托盘中使用的电缆）以及“限功率火灾报警电路电缆”（限用电缆）。1.2这些要求涵盖的电缆额定电压为300伏，但未作此标记。见44.1（h）。 1.3含有一个或多个电磁屏蔽层的电缆可进行表面标记，或使用标记带表明其已“屏蔽”。包含一个或多个光纤元件的电缆具有“-OF”补充字体，并根据45.1（d）进行标记。电缆可以由一个或多个同轴构件组成，也可以包含一个或多个同轴构件。1.4在表面标记或标记带上具有“耐阳光”或“耐阳光”的电缆的整体护套符合720小时耐阳光测试。1.5在表面标记或标记带上有“直埋”、“直埋”或“直埋”字样的电缆符合1000 lbf的压碎试验。带钢丝铠装、金属编织、互锁金属铠装或光滑或波纹金属护套的直埋电缆在金属覆盖层上有护套。1.6对于这些要求中涵盖的电缆，烟雾和火灾考虑如下: a） FPLP型电缆——根据美国国家电气规范（ANSI/NFPA 70）第760-154（a）节的规定，拟安装在管道、增压室和，或其他用于运输环境空气的空间，且该空间内的电缆未封闭在电缆管道中，应根据美国国家消防协会《空气处理空间用电线和电缆的火焰传播和烟雾测试标准方法》（ANSI/NFPA 262）进行烟雾和火焰特性测试。符合要求的电缆的最大火焰传播距离不超过5英尺、0英寸或152厘米，产生的烟雾峰值光密度不超过0.50（透光率为32%），产生的烟雾平均光密度不超过0.15。b） FPLR型电缆——按照第760节的规定，用于竖井垂直敷设或电缆穿过多个楼层的安装的电缆- 国家电气规范ANSI/NFPA 70第154（B）条。根据UL 1666《垂直安装在竖井中的电缆和光缆火焰传播高度标准测试》，对该电缆进行火焰传播特性测试。符合要求的电缆的火焰传播高度小于12英尺、0英寸或366厘米，12英尺、0英寸或366厘米处的温度为850.0华氏度（454.4摄氏度）或更低。c） FPL型电缆-FPL型电缆符合70000 Btu/h（20.5 kW）垂直电缆槽火焰测试。电缆制造商选择以下测试之一:1）23.2.1中引用的UL测试-本段在电气和光学设备的标准垂直托盘火灾传播和烟雾释放测试中采用UL火焰暴露（烟雾测量不适用）所述的测试方法- 光纤电缆，UL 1685，连接到表面标记为“FPL”或由标记带指定为“FPL”的电缆。给定结构的电缆不得出现到达任何试样上端（最大为8英尺、0英寸或244厘米）的烧焦。2）23.3.1中引用的FT4/IEEE 1202试验——本段采用的试验方法为FT4/IEEE 1202型火焰暴露（烟雾测量不适用）标准垂直托盘火灾传播和烟雾释放试验电缆和光缆，UL 1685。该测试与UL测试在负载（使用更多电缆，捆绑小电缆，电缆或电缆束之间的间距有限）、燃烧器角度和故障标准方面有所不同。为了符合要求，本测试损坏的电缆长度小于150厘米（59英寸）。符合要求的电缆没有标记，或在外表面或标记带上标明“FT4/IEEE 1202”或“FT4”字样（见44中的标记）。 1（i）]。d） 限功率火灾报警电路电缆-表面标记或用标记带指定为“限功率火灾报警电路电缆”或“POWER ltd火灾报警电缆”的电缆符合VW-1垂直试样火焰测试。电缆未标记“VW-1”。1.7如1.8所述，“限功率火灾报警电路电缆”用于电缆管道等保护。NEC不要求在电缆管道中使用这些要求中涵盖的所有其他电缆，这些电缆可以在没有电缆管道物理保护的情况下使用，但可以拉入导管或安装在其他电缆管道中。1.8“限功率火灾报警电路电缆”用于:a）电缆外露长度不超过10英尺或3.05米的非密封空间，b）电缆管道。1.9这些要求不适用于含有导电导线的电缆- 灯、电源或1级电路。这些要求不包括3级或2级功率限制电路的电缆（见功率限制电路电缆标准UL 13）、通信电缆（见通信电缆标准UL 444），或用于非功率限制火灾报警电路（NPLF型）的电缆。1.10这些要求不包括任何光纤元件或此类元件组的光学或其他性能。见8.3。

Please note: All interim revisions for this edition available at time of your purchase will be included.Cables for Power-Limited Fire-Alarm CircuitsUL 14241 Scope1.1 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), andc) 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).1.2 The cables covered in these requirements are rated for 300 volts but are not so marked. See 44.1(h).1.3 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 45.1(d). A cable may consist of or contain one or more coaxial members.1.4 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.1.5 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.1.6 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 760-154(A) 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 760-154(B) 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". A cable of a given construction shall not exhibit char that reaches the upper end of any specimen (a maximum of 8 ft, 0 inch or 244 cm).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 44.1(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".1.7 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.1.8 "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, andb) In raceway.1.9 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).1.10 These requirements do not cover the optical or other performance of any optical-fiber member or group of such members. See 8.3.