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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。
! T# t5 s* o1 V2 |( N/ ]仅以IEC 60598-1为例：5 i: w( J: w$ b/ W5 H0 f: x
1. 套管安装：0 d: q3 V' `% ~
4.9.1 Insulating linings and sleeves shall be so designed that they are reliably retained in$ f9 w& P! f" N& ~$ v8 G; M6 ^
position when switches, lampholders, terminals, wires or similar parts have been mounted.
* ]" w# b: W$ _/ l, x$ t5 w3 @0 ~3 P& h- M8 S# b1 W) h
2. 用于温度保护功能：; i4 h/ E+ Z( V' }9 Z) K4 N+ F
4.7.5 If the external wiring or supply cord is unsuitable for the temperatures reached inside
- v% t& J& o8 W- }the luminaire, either a connection shall be provided at the point of entry of the external wiring
3 ~8 C& W/ |( ?, F+ A' kinto the luminaire for the use of heat-resistant wiring after this point, or heat-resisting parts/ G6 S( X; T& d3 u
shall be supplied with the luminaire to cover the part of the wiring placed inside it, which6 Z2 B1 v4 b; t: O/ W7 T. [* \' b
exceeds the wiring temperature limit.
b3 ?8 r5 L. I3 J+ I. W) O; ]% W o& g5 X5 K/ Z
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）6 U- n' `, p; i& k; n" y
4.9.2 Insulated linings, sleeves and similar parts shall have adequate mechanical, electrical
( w1 G* _' i0 W& S. oand thermal strength. 1 t2 {6 U, V/ I w
Compliance is checked by inspection, by manual test and by the electric strength test in! d1 ^! ^( u/ S" J3 {8 b
accordance with Section 10. The thermal properties of wire and sleeve are checked in
$ Y' M8 y Z6 Baccordance with Section 12. Heat resistant sleeves used as covering for wires attaining a0 F, c3 K4 T: _2 A
temperature exceeding the values given in Table 12.2 of Section 12 shall comply with the+ Y# Y& G4 G+ S. D% m& V) v
requirements of IEC 60684, taking into account the temperature measured on the wire in; v: `$ |; j; g* a8 A/ o$ l
question. The sleeve shall be resistant to a temperature exceeding the temperature measured
8 y+ p9 E h) Yon 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）- ^* A! M5 n3 L! T2 X* b
5 g' s9 b; k b' Y
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。6 Y& {" N9 o$ T2 ^6 V& q
附电线的绝缘层厚度：; Y) q$ h0 p9 D& r2 K+ ^
5.3.1.1 For wiring which is directly connected to the fixed wiring, e.g. via a terminal block, and- _4 V" _6 Z1 L- _9 w5 w
the disconnection from the mains is relied upon by the external protection device(s), the
, `/ M2 e: ~* n% kfollowing is applicable:
5 N$ j% |* W6 h8 @0 kFor normal operating currents higher than 2 A:0 }9 N. d- ]9 R5 W7 \+ b" H
– nominal cross-sectional area: minimum 0,5 mm2,
7 m, v! W; y) f. q* E; q– for through-wiring of fixed luminaires: minimum 1,5 mm2," [5 S: e) T9 ~6 r
– nominal insulation thickness: minimum 0,6 mm (PVC or rubber).4 |7 i# O/ Y- l K. T$ d9 a
For mechanical protected wiring carrying normal operating currents lower than 2 A:8 _" t: L% e+ V: b
– nominal cross-sectional area: minimum 0,4 mm2,3 D8 w- E% e4 i. w3 q: B8 G" G
– 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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