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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。9 b8 Y3 w) l# D0 r3 f
仅以IEC 60598-1为例：
: d3 X" N2 Q4 r3 N! a( e1. 套管安装：% c4 D' F! Y2 j
4.9.1 Insulating linings and sleeves shall be so designed that they are reliably retained in3 {5 t9 I7 u- G# n7 C
position when switches, lampholders, terminals, wires or similar parts have been mounted.; t9 I/ I2 g& V' v+ Y. N
; B8 h# @4 O( `
2. 用于温度保护功能：: ^. u0 B. \# g* i' d/ C/ } q2 n
4.7.5 If the external wiring or supply cord is unsuitable for the temperatures reached inside
9 g; w+ t( e; G# V9 w4 d$ Tthe luminaire, either a connection shall be provided at the point of entry of the external wiring! |2 M: S& W% ^6 ?7 W4 N7 E
into the luminaire for the use of heat-resistant wiring after this point, or heat-resisting parts, Z x- _' A) a, u- ?
shall be supplied with the luminaire to cover the part of the wiring placed inside it, which
* V* V$ i! T1 s, d5 x( aexceeds the wiring temperature limit.
' L, w+ p" T: ~6 ^2 O/ `$ j( W( `, ^& J* N( t7 \$ }
3. 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）
) \' D: m; `2 z4.9.2 Insulated linings, sleeves and similar parts shall have adequate mechanical, electrical: D" n/ z0 p3 {. }" L
and thermal strength. ) P5 s E+ o- e
Compliance is checked by inspection, by manual test and by the electric strength test in& {* R7 N! z$ Z( S4 Q' a9 a# Y
accordance with Section 10. The thermal properties of wire and sleeve are checked in
& B9 E" W6 D+ P) {& zaccordance with Section 12. Heat resistant sleeves used as covering for wires attaining a" A5 J X% p0 X4 K* C. e2 w
temperature exceeding the values given in Table 12.2 of Section 12 shall comply with the7 n: L, x5 l1 l
requirements of IEC 60684, taking into account the temperature measured on the wire in
9 [% N4 X5 k1 \; w7 p0 fquestion. The sleeve shall be resistant to a temperature exceeding the temperature measured
+ S( S) U8 O. n' ?6 L4 p& ~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）' L/ Y8 `. o( Q9 J8 w
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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。
3 y/ X9 i8 F4 }2 L' k附电线的绝缘层厚度：
5 _' W" i4 C/ g' [' ?7 `. O5.3.1.1 For wiring which is directly connected to the fixed wiring, e.g. via a terminal block, and7 U# a6 u% }% {0 i( G& l$ b
the disconnection from the mains is relied upon by the external protection device(s), the" [7 E9 N# d# n$ g; _5 U
following is applicable:2 F/ n) E% S: x4 {: J' O
For normal operating currents higher than 2 A:
+ u; s7 O; Q4 X3 G– nominal cross-sectional area: minimum 0,5 mm2,+ U/ L% Q8 T* b. t, J! y. d" ]" d# A
– for through-wiring of fixed luminaires: minimum 1,5 mm2,! M: J& p) z, s/ i& I8 d
– nominal insulation thickness: minimum 0,6 mm (PVC or rubber).) T* E3 B) P4 u' e: _
For mechanical protected wiring carrying normal operating currents lower than 2 A:
" _: C+ J- N- |. k+ {– nominal cross-sectional area: minimum 0,4 mm2,
, t% d% ~& v2 e" L* Y ]# J j– 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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