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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。
' O# v( e/ p- C3 \, c# ]仅以IEC 60598-1为例：
. E3 s# @) k0 e5 X4 Z* C1. 套管安装：6 N( M% T* C' v( @; X$ ]8 n
4.9.1 Insulating linings and sleeves shall be so designed that they are reliably retained in1 W, t3 L& Y- I; @ h" i
position when switches, lampholders, terminals, wires or similar parts have been mounted.
0 R* s) I. d' b# L& z# \) p. n+ w% M! ?- B& c5 I# F# M" S
2. 用于温度保护功能：$ D3 V% e2 \# k: N U3 B
4.7.5 If the external wiring or supply cord is unsuitable for the temperatures reached inside
2 G% s5 Q- o6 ^% G* A T6 l( jthe luminaire, either a connection shall be provided at the point of entry of the external wiring% {5 M# ^: {. X% {- z
into the luminaire for the use of heat-resistant wiring after this point, or heat-resisting parts4 H0 j8 m1 \9 c3 J9 k/ q" ~
shall be supplied with the luminaire to cover the part of the wiring placed inside it, which
& G! P# o/ g! j7 K6 p9 ^exceeds the wiring temperature limit.
5 [9 T9 V6 p$ B; }* R
5 t7 n3 W' b+ i4 B* _2 G( g( b3. 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）3 r! M% D% k) J+ \& e
4.9.2 Insulated linings, sleeves and similar parts shall have adequate mechanical, electrical9 V) m/ O, ^) `3 k$ ?
and thermal strength. 4 x& i$ G% \9 O0 G3 Q) l6 j( s( n
Compliance is checked by inspection, by manual test and by the electric strength test in. r a) f- p+ }
accordance with Section 10. The thermal properties of wire and sleeve are checked in& E* z# G& U5 _% S% ]; T2 c
accordance with Section 12. Heat resistant sleeves used as covering for wires attaining a
! Z6 G! X) N! @& |; I& c0 J1 c7 ltemperature exceeding the values given in Table 12.2 of Section 12 shall comply with the
9 u1 \; v0 }0 S6 P8 r" Brequirements of IEC 60684, taking into account the temperature measured on the wire in
- L* s' ~0 ]5 w3 W/ Yquestion. The sleeve shall be resistant to a temperature exceeding the temperature measured- S3 D' L! j8 \
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）
$ B; `7 e( d. E! c+ Y
+ K. u0 E3 g& g j4. 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。' a) l( T: z* ^
附电线的绝缘层厚度：2 C$ N; n: |* e1 i5 E* k
5.3.1.1 For wiring which is directly connected to the fixed wiring, e.g. via a terminal block, and
+ y h' l! j6 F- Hthe disconnection from the mains is relied upon by the external protection device(s), the3 v4 |3 N- c( e, n0 F
following is applicable:! ~) e0 ?$ k( a5 F
For normal operating currents higher than 2 A:+ ~; v, |* v+ Q- J$ ?
– nominal cross-sectional area: minimum 0,5 mm2,# i% t4 _# _3 k. A8 V- C
– for through-wiring of fixed luminaires: minimum 1,5 mm2,
3 e; y! W7 v' ~9 I) |' r– nominal insulation thickness: minimum 0,6 mm (PVC or rubber).
& n% H, o, s' B* o8 p$ q# y: H+ S( ?For mechanical protected wiring carrying normal operating currents lower than 2 A:
5 Q. l1 R( k$ I– nominal cross-sectional area: minimum 0,4 mm2,
4 j7 @/ G$ E: X9 w4 y7 d/ 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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