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这个问题很好。8 t( b' D: ~' a O* Q3 Z
首先要理解清楚外壳的定义,UL1598原条款是这样的:
7 d3 X0 m" j* y( @3 h, z$ h5 G5.3.2 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.
: @! y4 V, `2 }8 B5 z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。) P' O5 @9 {6 i* W) @% I' B9 k8 _
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,
, j7 L) c, I$ L$ M* h0 {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:! d1 @4 v0 u8 V" y9 ?1 E" m
(a) visible for the entire accessible length;
6 p* J& U" l1 }- p4 l6 f C/ q(b) routed, where practicable, to a structural part of the luminaire;
" P+ q, `& d2 M) d6 N+ r! M" W, V(c) secured at least every 75 mm (3 in) if stranded wire or every 100 mm (4 in) if solid wire,5 K. ]$ W1 g* u, m$ J
where practicable, to a structural part of the luminaire, or threaded through chain links of the
2 B7 E; z2 Z* [3 Zluminaire; and
1 {' L+ [1 j9 K& n; E2 \3 b9 i3 S(d) in compliance with Item (1) or (2), as follows:/ ^" h- P# A9 c! T' T) _. e5 N6 \
(1) accessible for no more than 100 mm (4 in) and not containing any splices; or: n$ `5 q% e7 M4 n0 p& D
(2) enclosed in a minimum 0.25 mm (0.010 in) thick glass fiber or thermoplastic
- I/ o- |# t$ d% A1 usleeving and factory-made splices using insulated crimp-type connectors are enclosed0 l$ R8 g/ U4 {* A) k" t
in a minimum 0.25 mm (0.010 in) thick glass fiber or thermoplastic sleeving.: X2 X7 [! u6 L% e
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。
+ {& e, i5 Q9 G4 D4 U 所以传统式的荧光灯里吗电线及接头可以外露。
4 H" b+ w/ x- F5 \7 n" O% R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。 `% r0 [3 H2 r, L/ S" ~1 {
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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