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The following situations are exempt from the above requirements:3 D7 t, Y9 o' x
– where terminals for the connection of a supply are provided on a component (for example, a terminal block) or subassembly (for example, a power supply unit), the symbol(没圈的接地符号) is permitted for the protective earthing terminal instead of(有圈的接地符号) ; . q) }+ w W; m1 W {' {6 Z b) A, d
本人理解如下:$ U' a( t" O2 k) m( s
如果设备的端子连接的是一个零件(例如一个终端模块)或者组件(比如一个电源),有圈的接地符号可以代替没圈的接地符号。" B% H2 R: @& j0 \8 @
– on subassemblies or components, the symbol(有圈的接地符号) is permitted in place of the symbol(没圈的接地符号)provided that it does not give rise to confusion.;# i" e, x( |# _ z/ K1 v% I( B+ m. ~2 H# ]
-->组件或者零件间的连接,如果用没圈的接地符号代替没圈的接地符号不会引起误解,则允许替代。; m8 q+ `! O1 {# m1 e1 N/ V7 B
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