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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。( P2 r q/ X1 Z- W8 a
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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。
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下面是NFPA 70中关于tap conductor的摘录：0 Q6 w! z/ M6 _: u- Y
410.117 Wiring.% y7 x7 c& ^. L* |: u: Z& N1 f
(A) General. Conductors that have insulation suitable for the temperature encountered shall be used.: B- t: ~; z& l" V0 [7 \* |
(B) Circuit Conductors. Branch-circuit conductors that have an insulation suitable for the temperature encountered
$ B( y( ?: `$ E* l P" S2 o: e( |shall be permitted to terminate in the luminaire.
; k% w4 p# q7 s$ ~/ K. V; r(C) Tap Conductors. Tap conductors of a type suitable for the temperature encountered shall be permitted to run from: p: P6 h8 ~* I6 V0 [
the luminaire terminal connection to an outlet box placed at least 300 mm (1 ft) from the luminaire. Such tap conductors
( m X& [( q; O2 F7 l* u/ Yshall 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.% N6 \4 ~7 ? _& a
' d4 T4 b+ Z7 z, h: b' ]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。
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# e; G* W! V0 w, o$ \! q2 V下面是NFPA 70关于软线连接的灯具的部分要求：
- W+ H- _) t N' ^410.62 Cord-Connected Lampholders and Luminaires.
8 M8 `5 m' l- P, \1 c6 p% _& B(C) Electric-Discharge and LED Luminaires.
" j- S4 k* S, n( X(1) Cord-Connected Installation. A luminaire or a listed assembly shall be permitted to be cord connected if the following conditions apply:
8 J* A6 l2 K/ \7 a0 o(1) The luminaire is located directly below the outlet or busway.: b. F$ v/ }" P9 d; e1 a
(2) The flexible cord meets all the following:
/ o( f& E: u5 z! M% I1 u" U+ g; ~6 Da. Is visible for its entire length outside the luminaire
9 z- d+ T9 S0 f# i. d% Zb. Is not subject to strain or physical damage: u7 M/ {- f( O0 D/ g
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./ A0 o9 Z5 k( x) T
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。! E/ W. l4 [0 e, y {# B
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发表于 2012-3-31 15:47
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