tap conductor是什么东西？
如题！ 就是筒灯中那个junction box和housing之间软管中的线吗？ J哥，翻出你这个旧帖子了。我的1598资料还在整理当中，这部分信息我也会加进去。我查找了一下资料，把一些信息列在这里供你参考一下。那查看了NFPA 70中关于灯具的要求410章节，发现tap conductor就是固定连接到灯具内部端子的导线，用于连接到安装地点的电源出现盒的灯具导线，在这里姑且叫做“分流导线”。根据1598的要求，嵌入式灯具的tap conductor要求要有线管保护。但根据NFPA 70的要求来看，分流导线必须要有线管保护。
下面是NFPA 70中关于tap conductor的摘录：
410.117 Wiring.
(A) General. Conductors that have insulation suitable for the temperature encountered shall be used.
(B) Circuit Conductors. Branch-circuit conductors that have an insulation suitable for the temperature encountered
shall be permitted to terminate in the luminaire.
(C) Tap Conductors. Tap conductors of a type suitable for the temperature encountered shall be permitted to run from
the luminaire terminal connection to an outlet box placed at least 300 mm (1 ft) from the luminaire. Such tap conductors
shall be in suitable raceway or Type AC or MC cable of at least 450 mm (18 in.) but not more than 1.8 m (6 ft) in length.
另外，灯具允许使用软线（即符合绝缘要求的用于给电器具供电的电源线）方式进行连接，根据1598，软线连接是不需要用导管保护的，而根据NFPA 70下面的条款，软线连接的灯具，软线的输入端必须有插头、连接器、符合要求的布线系统，或者不带插头、连接器时要带出现盒盖子+线管。
下面是NFPA 70关于软线连接的灯具的部分要求：
410.62 Cord-Connected Lampholders and Luminaires.
(C) Electric-Discharge and LED Luminaires.
(1) Cord-Connected Installation. A luminaire or a listed assembly shall be permitted to be cord connected if the following conditions apply:
(1) The luminaire is located directly below the outlet or busway.
(2) The flexible cord meets all the following:
a. Is visible for its entire length outside the luminaire
b. Is not subject to strain or physical damage
c. Is terminated in a grounding-type attachment plug cap or busway plug, or is a part of a listed assembly incorporating a manufactured wiring system connector in accordance with 604.6(C), or has a luminaire assembly with a strain relief and canopy having a maximum 152 mm (6 in.) long section of raceway for attachment to an outlet box above a suspended ceiling.
那么比对灯具的软线和分流导线的区别，软线安装灯具中符合要求的软线不需要导管保护，但是软线一般带有插头，软线须含地线。而分流导线则不带插头，必须有线管保护，线管和分流导线连接到安装场所的电源出线盒上。
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