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引用第12楼hli168于2007-05-16 21:09发表的 :6 Z2 m2 U# h+ ^) P
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我听认证公司的工程师说一台机器只有一个带圆圈的,其他接地的不要带圆圈,带圆圈的就是电源线进来处的接地。[s:3]
/ G6 D6 ^) H0 o, |0 H5017 Earth (ground) : C, q- @/ N- I. x6 v7 P8 J
To identify an earth (ground) terminal in cases where : [: e5 c5 p' ^4 \( D$ c. Z: z
neither the symbol 5018 nor 5019 is explicitly required. ; g! Y& K1 L. u6 ?5 h
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5019 Protective earth (ground)
! q" o% ~6 ?1 Y% @) `0 G n7 a+ `To identify any terminal which is intended for connection to3 [$ F' V; W! M# {4 k$ m0 _
an external conductor for protection against electric shock, _" O3 r2 n5 {* @& \4 Z
in case of a fault, or the terminal of a protective earth3 v5 n3 l1 p( t L9 V4 w
(ground) electrode.
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P9 I1 r/ E: P( [7 c7 n4 O我是想明白5019这个地线贴纸的粘贴位置. |
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