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我认为各个标准会有不同的要求，所以想得出一个统一的答案是比较困难的。
# K: u$ X4 _/ C$ {" [3 j仅以IEC 60598-1为例：( E( _6 c! a+ y% D2 z/ i
1. 套管安装：* R4 @! ?! `( ^5 [* w" g
4.9.1 Insulating linings and sleeves shall be so designed that they are reliably retained in
1 P3 ~/ H' I' F, a5 g( ~position when switches, lampholders, terminals, wires or similar parts have been mounted.
& B0 c6 r- q; l+ F4 d# }' K( `2 L; E! g8 r R- m1 Z
2. 用于温度保护功能：7 t v3 H P* `
4.7.5 If the external wiring or supply cord is unsuitable for the temperatures reached inside R7 n0 B# H- s% y M
the luminaire, either a connection shall be provided at the point of entry of the external wiring0 k4 W/ e& p. O2 Z0 c
into the luminaire for the use of heat-resistant wiring after this point, or heat-resisting parts( A8 y( S& R9 A5 D7 ]
shall be supplied with the luminaire to cover the part of the wiring placed inside it, which2 \; A. F( v; ~+ ~7 \
exceeds the wiring temperature limit.* x; @0 {% }: q+ G8 m% {; J
$ ^% R9 S+ @' l! E6 B, |* R- N3. 类似的绝缘功能（具体是基本绝缘，附加绝缘或是加强绝缘看材料达到的测试等级）
L8 v$ v( W. s* c9 A2 O4.9.2 Insulated linings, sleeves and similar parts shall have adequate mechanical, electrical, X: m* a: d# r0 d" y, O
and thermal strength. ; Q, P" K9 R8 M( ?+ Q0 i
Compliance is checked by inspection, by manual test and by the electric strength test in: K2 ^( E& H: M. { P+ W* ?
accordance with Section 10. The thermal properties of wire and sleeve are checked in0 h) N" o8 \( }8 \; f
accordance with Section 12. Heat resistant sleeves used as covering for wires attaining a7 F" H0 w- Q; L8 }$ @: B
temperature exceeding the values given in Table 12.2 of Section 12 shall comply with the: i: l9 ]* ]6 e' L$ p
requirements of IEC 60684, taking into account the temperature measured on the wire in# ]1 `8 n t. `+ f9 a' l) H" M! h
question. The sleeve shall be resistant to a temperature exceeding the temperature measured1 W2 i$ P% N! \5 Y: G0 r( I N
on the wire by 20 °C or withstand the following test（潮态处理，温度处理，耐压测试，泄漏电流测量）- d* z: P4 B; G# g/ q1 N+ C% L
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4. 套管厚度，在IEC60598里面没有相应条款指出，是否可用电线绝缘层厚度做参考，我认为不合适。
" ]" _; r4 ^5 B2 m附电线的绝缘层厚度：1 L. K6 L, r, c4 Z! n6 @8 {
5.3.1.1 For wiring which is directly connected to the fixed wiring, e.g. via a terminal block, and3 S+ V9 t* K: C! C
the disconnection from the mains is relied upon by the external protection device(s), the, O: Q. j; ~# j. V
following is applicable:
7 q3 Y: ^3 S5 q# a0 ^For normal operating currents higher than 2 A:# X* V( t- s, Z: @. {( M
– nominal cross-sectional area: minimum 0,5 mm2,
+ V3 O- p% E# k& t6 h) D– for through-wiring of fixed luminaires: minimum 1,5 mm2,9 n# _" K% ^1 M8 X8 j* K
– nominal insulation thickness: minimum 0,6 mm (PVC or rubber).. n+ s7 z8 Y' K* v% |8 h
For mechanical protected wiring carrying normal operating currents lower than 2 A:: h' J" Z% a6 B- i0 ?3 g
– nominal cross-sectional area: minimum 0,4 mm2,
6 q) N! H3 S* [2 Y5 \; y, _– nominal insulation thickness: minimum 0,5 mm (PVC or rubber). |
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发表于 2011-6-24 12:46
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