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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。/ _' {- Z0 g6 r& j- R* T* G
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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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0 H9 ?3 f j/ F) _4 O下面是NFPA 70中关于tap conductor的摘录：9 Q! ]8 p( j) j0 _9 y' L& Z
410.117 Wiring.' J# l$ p% K" Z* N0 L- u1 u
(A) General. Conductors that have insulation suitable for the temperature encountered shall be used.0 ~- _/ H: x1 ~3 n) b
(B) Circuit Conductors. Branch-circuit conductors that have an insulation suitable for the temperature encountered
# e9 e5 ]- K7 lshall be permitted to terminate in the luminaire.( d5 _2 @; b( ]. t* p `
(C) Tap Conductors. Tap conductors of a type suitable for the temperature encountered shall be permitted to run from
+ y6 ]* n6 N; I! p& e: p _; ]the luminaire terminal connection to an outlet box placed at least 300 mm (1 ft) from the luminaire. Such tap conductors
" j/ V+ @( {7 Q {" _& `! tshall 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.) T. M! @# ?7 o& [
& O+ g: [+ [; r6 U( I5 z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。. @7 a& W0 R% B/ i
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下面是NFPA 70关于软线连接的灯具的部分要求：0 p3 N2 B3 v2 \- T: F
410.62 Cord-Connected Lampholders and Luminaires.0 Q; S! |: t' b0 ]/ h
(C) Electric-Discharge and LED Luminaires.
7 o" [4 Q# i& k% S8 u/ v* Y; i: k(1) Cord-Connected Installation. A luminaire or a listed assembly shall be permitted to be cord connected if the following conditions apply: X6 k8 |, Y/ t: T( ]: s1 D
(1) The luminaire is located directly below the outlet or busway./ L6 S% u% p; \, m" }6 E
(2) The flexible cord meets all the following:: H- t! L0 }0 i' f5 v
a. Is visible for its entire length outside the luminaire
) k5 A2 d" }# E; \! |b. Is not subject to strain or physical damage# K* O1 V: S; @
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.
" u6 n# u% |- `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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发表于 2012-3-31 15:47
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