本帖最后由 AASTAR 于 2011-1-31 19:56 编辑 ) }5 l* ~5 w( V& h( X# E
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30-400 Wiring of luminaires$ c+ b% J) j0 J+ x* b; k
All electrical wiring on or within a luminaire shall be c1 ~2 h* x2 Z V
(a) neatly arranged without excess wiring; 6 H. z8 U- v' N% K @$ L$ m(b) not exposed to mechanical injury; and ( j' S5 d% d9 H& X. b% Y. D4 S(c) arranged so that it is not subjected to temperatures above those for which it is rated./ Y5 @3 ]) b! e% J( o% q2 N" P j
30-402 Colour coding 2 A. l/ [! D7 wNotwithstanding the requirements of Sections 0, 4, and 10 with regard to the colours used for distinguishing and identifying conductors, a continuous-coloured tracer in the braid of an individual braided conductor shall be permitted for the supply conductors of a luminaire, the colour of the tracer being black, white, and green for the ungrounded, identified, and bonding conductors respectively.$ H- l3 S7 w" }
30-404 Conductor insulation( r" w \( [* ]* a' R1 M
Luminaires shall be wired with conductors at least No. 18 AWG, having insulation suitable for the voltage and temperatures to which the conductors may be subjected.6 u$ _9 @$ J% T
30-408 Wiring of ceiling outlet boxes 1 v1 F; w) W( L* c; L l; h(1) Branch circuit conductors having insulation suitable for 90 °C shall be used for wiring of ceiling outlet boxes on which a luminaire is mounted, except for boxes in wet locations where Type NMW or NMWU cables are used." I3 C6 l+ O- }; V4 b! X
(2) For purposes of compliance with this Rule, the ampacity of 90 °C wire shall be limited to the ampacity of 60 °C wire.
changlu兄新年快乐! 兄台太客气了, 其实changlu兄的电工实战经验,不但对于我,我想对于我们大多华人电工,都是一个很好的学习资源.兄弟说话不周之处, 还望见谅.0 n' N! x% s' o9 f x
changlu兄真是妙人,四个字点中这吸顶灯一要害:防潮. 不但是机关, 在我私下看来,还是"死穴". 为什么这么说呢? 我觉得这个问题深究起来,是根本无法解决的 (独家看法).