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BARRY:4 p! l$ v- J7 K( i
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见下文, 还是有限制的,只是限制的方法不同,条例是我在IEC60950中找的,回头我也找UL60950看看是不是一样的. a, I7 |% `+ D/ S4 Y* f
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5.1.7 Equipment with touch current exceeding 3,5 mA$ d- ]% \$ `* T
For STATIONARY PERMANENTLY CONNECTED EQUIPMENT or STATIONARY PLUGGABLE EQUIPMENT
) D( E8 R- a' f3 bTYPE B having a main protective earthing terminal, if the TOUCH CURRENT measurements7 h- E" y3 S0 a7 q2 i
exceed 3,5 mA r.m.s., all of the following conditions apply:1 ?/ o2 k8 m: ?& H, i
– the r.m.s. PROTECTIVE CONDUCTOR CURRENT shall not exceed 5 % of the input current per0 ^/ i+ }9 B3 ?: d
line under normal operating conditions. If the load is unbalanced, the largest of the three
- C N) J5 D9 j% T4 uline currents shall be used for this calculation. To measure the PROTECTIVE CONDUCTOR
- g" f1 t) q' X3 N# y' SCURRENT, the procedure for measuring TOUCH CURRENT is used but the measuring
9 s+ y, ] ^* o/ M" jinstrument is replaced by an ammeter of negligible impedance; and' o. @" g( Z* R* I, C2 h9 Q
– the cross-sectional area of the PROTECTIVE BONDING CONDUCTOR shall be not be less than; c& r( d7 d, U7 D8 Y
that of the conductors in table 3B (see 3.2.5), with a minimum of 1,0 mm2 in the path of
% W) m! s/ ^' n& ~high PROTECTIVE CONDUCTOR CURRENT; and
" G7 L% [% s; o1 G: |' y: v– one of the following labels, or a label with similar wording, shall be affixed adjacent to3 p, A: S/ v5 |2 v0 y/ l
the equipment AC MAINS SUPPLY connection:3 {/ U5 O$ X% \% w. q3 [
WARNING0 X* a3 C1 B0 T! S$ C3 }
HIGH LEAKAGE CURRENT, c8 K3 D1 Q! W! d. w/ P
EARTH CONNECTION ESSENTIAL
6 w8 |0 f4 q2 q1 ?: X- V5 G- lBEFORE CONNECTING SUPPLY
8 _ [6 @5 Q4 ~& Y, J+ } W# OWARNING
5 I+ w3 {' F; }HIGH TOUCH CURRENT
# ]% H0 t- z, G+ T8 jEARTH CONNECTION ESSENTIAL
+ c! Y ?- [9 ^ OBEFORE CONNECTING SUPPLY |
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