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这个问题很好。
U2 Z1 [6 I* s) C6 I: f* C& X首先要理解清楚外壳的定义,UL1598原条款是这样的:
' r1 v4 p( ]: w6 M6 s1 `7 S5.3.2 All splices, open coil devices, capacitors, leads or terminals for field connection of supply wires, and other arcing live parts shall be provided with an enclosure.
5 h" b: I# [$ I% x6 c需要外壳的原件如上,接头,铁心线圈式设备,电容,用于最终现场接线的电线及线头等。# ~" t/ g( Z" E% {
1.接头splice。这点确实需要外壳,但是,UL1598中有一处例外条款,在6.13.3.3,
) {0 f% ]- B7 G5 D1 }% @6.13.3.3 Flexible cords, equipment wire, and 600 V rated appliance wiring material specified in Tables 6.9.1 (CAN), 6.9.2 (USA), and 6.9.3 (USA) may be accessible if:. E0 Q1 R8 y; [6 T8 a1 o+ Z0 {
(a) visible for the entire accessible length;
1 q' f" z7 c% K7 W( ~2 \(b) routed, where practicable, to a structural part of the luminaire;
' N* t) o5 {( Q% ]' f(c) secured at least every 75 mm (3 in) if stranded wire or every 100 mm (4 in) if solid wire,9 U. n; ^1 l2 U" F5 m, t. K* _( Q
where practicable, to a structural part of the luminaire, or threaded through chain links of the
. P' V* t& L. ]5 |6 P6 W: d6 aluminaire; and
) s* {6 q: O! Q5 J7 I+ i(d) in compliance with Item (1) or (2), as follows:
* V8 Z0 b( z+ Q' m" N, N(1) accessible for no more than 100 mm (4 in) and not containing any splices; or
5 l$ z0 s6 `3 d(2) enclosed in a minimum 0.25 mm (0.010 in) thick glass fiber or thermoplastic5 i5 m1 F+ }5 u8 }& e' }. v
sleeving and factory-made splices using insulated crimp-type connectors are enclosed( i- O' X8 d! j" }6 y# s% b
in a minimum 0.25 mm (0.010 in) thick glass fiber or thermoplastic sleeving.
# B- j# H# f5 |* q) \/ w3 p, ^% B从以上可以看出,如果AWM的电线额定值在600V,而且可以看到整个长度,每隔75mm固定一次,如果有接头splice,用夹式的奶嘴端子,并包裹上0.25mm后的套管,则不需要外壳或者barrier。2 q- n; W$ o$ v$ K- ^# s
所以传统式的荧光灯里吗电线及接头可以外露。
$ e5 Z( H Q4 @至于灯座,启辉器这些原件,可以看6.13.2.3 The live parts of a lampholder or starter holder that make the electrical connection to the lamp or starter may be accessible.,是不需要外壳的。0 x, D# J* ]/ m$ L3 o Q
整流器,则需要看其是不是Listed compornent,如果是,不需要外壳,如果不是,则需要看其UL报告中的C OF A 里面有没有要求其最终使用要带外壳。 |
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