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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。
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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:" w7 w% Z- z. A) M+ y% N1 Z
410.117 Wiring.
. ]" `; S1 Q! W5 L1 Q(A) General. Conductors that have insulation suitable for the temperature encountered shall be used.
+ [4 \- l D$ t! Q(B) Circuit Conductors. Branch-circuit conductors that have an insulation suitable for the temperature encountered5 J' O. ^' ?2 h( q ^
shall be permitted to terminate in the luminaire.4 @2 _3 r0 L5 S4 z9 J' i
(C) Tap Conductors. Tap conductors of a type suitable for the temperature encountered shall be permitted to run from' G( L8 U7 z+ C. N/ B' ~
the luminaire terminal connection to an outlet box placed at least 300 mm (1 ft) from the luminaire. Such tap conductors
: t2 [* ?4 b3 l1 T4 T2 M Ishall 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.
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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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8 F2 O w& n' i+ ]. Y; z/ k/ r下面是NFPA 70关于软线连接的灯具的部分要求:! l9 H, q5 g3 g1 j! J
410.62 Cord-Connected Lampholders and Luminaires. K, G: ]5 o3 j4 l2 |( \" M
(C) Electric-Discharge and LED Luminaires.! C/ `' n+ x. A1 `8 Z
(1) Cord-Connected Installation. A luminaire or a listed assembly shall be permitted to be cord connected if the following conditions apply:
7 Z# c. Z J x2 W: D(1) The luminaire is located directly below the outlet or busway.% O- _: a6 e) ^, D, o+ l
(2) The flexible cord meets all the following:
+ U! U+ G4 G; h; b9 g& g, Ea. Is visible for its entire length outside the luminaire
- z6 V$ j: o( S$ x2 f) Yb. Is not subject to strain or physical damage
) z4 F |7 `. S8 Z+ I, B* N# _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.4 w% P) A" ~. X. K
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。. \6 a6 d( ?# Q% I: A
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