可以看看 IEC60598-1的
1 x% @/ K- l2 E( E$ w) c; e$ P4 }5.3.1.2 For wiring which is connected to the fixed wiring via an internal current-limiting device
0 C9 e) h' c! iand limiting the current to 2 A maximum, e.g. lamp current control device, circuit cut-outs,
- [; X% T: {) `- H) i1 E! y6 e0 Afuses, protective impedance or isolating transformers, the following is applicable, \! B. J- Y' u* o0 `' J
– the minimum cross-sectional area which may be less than 0,4 mm2 shall be selected in3 I3 U: W/ {' O, X7 A$ O
relation to the maximum current during normal operating conditions and the time and level
' L8 \* ^+ [# p1 [; G/ ]& s3 L. Rof the current flowing during failure conditions, owing to the fact that overheating of the wire2 a7 x3 C, y* Q! c' K+ |& h
insulation shall be prevented under any condition;
3 z* c' A; B! X1 f M; f看看这段话啦,应该可以明白的 |