可以看看 IEC60598-1的) l9 w9 [% T3 B! q
5.3.1.2 For wiring which is connected to the fixed wiring via an internal current-limiting device
" u2 f) L' @2 u1 J: {0 [and limiting the current to 2 A maximum, e.g. lamp current control device, circuit cut-outs,; I, `8 G8 Q v9 x# N$ ?
fuses, protective impedance or isolating transformers, the following is applicable( g; Y) c" O w# {
– the minimum cross-sectional area which may be less than 0,4 mm2 shall be selected in
1 \) T9 k1 B9 nrelation to the maximum current during normal operating conditions and the time and level9 ^: Q- q5 I( g
of the current flowing during failure conditions, owing to the fact that overheating of the wire) v z+ S. N$ ~. ]8 \
insulation shall be prevented under any condition;* Z! E+ V8 r( z, s" \2 i
看看这段话啦,应该可以明白的 |