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5.3.1.2 For wiring which is connected to the fixed wiring via an internal current-limiting device
u8 |$ e3 W. Z' d7 F8 q9 ?and limiting the current to 2 A maximum, e.g. lamp current control device, circuit cut-outs,
- e/ s# L4 ~# y6 Y0 W! @fuses, protective impedance or isolating transformers, the following is applicable:/ r5 q' q' T# B) d2 Y4 Z
– the minimum cross-sectional area which may be less than 0,4 mm2 shall be selected in9 ~9 e" u* m) t& Y
relation to the maximum current during normal operating conditions and the time and level
, R5 m- e: I9 V Vof the current flowing during failure conditions, owing to the fact that overheating of the wire
( N9 N x1 \* a! r2 Q; iinsulation shall be prevented under any condition;
1 h# g4 k' B" a9 U+ ?* O7 C5 u– the minimum insulation thickness, which may be less。
! q; u( F; I& @( k) u6 Q应该属于内部线,通过隔离变压器(最后一个)连接到固定布线,所以应不小于0.4mm2。
0 V6 H; i$ x3 [- @$ _# H [* \# n4 ^* \( d- U m
楼主所说的是测试机构最保险的测法:
" }3 T$ S3 a2 A* d5 H2 x7 Z3 p5.2.2 题目 电源连接和其它外部软线1 u/ M! w0 P8 p: S+ D& h: v4 O
即使那个表不适用,但后面的平方数是没有专指是不可拆卸还是可拆卸软线的,所以存在争议。5 T) y& r5 h- h5 {, v
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如果认为外部软线适用,而不是内部线,那么是指低压三类灯具本身,才能叫外部软线,不能包括变压器。按GB7000.204标准,如果重量小于1千克,还有其它条件,那么电线也可以用到0.5mm2。 |
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