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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。! ~/ f- Q. d9 b% |1 x
$ z# a: a0 ?# N0 w% _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。* |: W; Q) l. @- I% `
8 z, n B. b5 u% c下面是NFPA 70中关于tap conductor的摘录:
: ]( m q4 Y& ]! M5 t& }6 t( _. |410.117 Wiring.) n# A( o% ~$ n' o1 B- e
(A) General. Conductors that have insulation suitable for the temperature encountered shall be used.
$ k! l/ c+ w1 q8 L. s+ v(B) Circuit Conductors. Branch-circuit conductors that have an insulation suitable for the temperature encountered* D+ E) O8 i5 s3 M- k n' R; p
shall be permitted to terminate in the luminaire.0 S% P& a% ^# e
(C) Tap Conductors. Tap conductors of a type suitable for the temperature encountered shall be permitted to run from& W: l+ a4 z. W0 m l. d
the luminaire terminal connection to an outlet box placed at least 300 mm (1 ft) from the luminaire. Such tap conductors
! C& ?9 ^' K |" @& Rshall 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- u7 E m) @1 R7 {# g1 m
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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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下面是NFPA 70关于软线连接的灯具的部分要求:
2 U9 a. c- P0 J1 q$ T410.62 Cord-Connected Lampholders and Luminaires.
$ G0 l3 m* n R' q7 e(C) Electric-Discharge and LED Luminaires.
S# A& q" S# J0 Z% G(1) Cord-Connected Installation. A luminaire or a listed assembly shall be permitted to be cord connected if the following conditions apply:
4 G4 N5 e! x Z7 c9 B(1) The luminaire is located directly below the outlet or busway.
/ `$ M* p7 P' i* ^, S; O0 R; S(2) The flexible cord meets all the following:
' J+ e8 N' f$ V3 ]9 ^a. Is visible for its entire length outside the luminaire
) Q9 h& R, i! p" M' X6 Gb. Is not subject to strain or physical damage9 l/ D6 r8 O S) m8 Z
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.
! Y7 {3 b4 N5 Z* n V# e# M* x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。1 \4 V9 W0 s* }3 D
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