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The following situations are exempt from the above requirements:
+ l% l( r) N) }; k# r9 j2 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) ; - ]. q3 r3 ]) Q2 L7 q* Q8 j8 \
本人理解如下:
+ h! _+ C9 \2 ~0 I/ w9 k2 s# }! 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。, Q7 Y( P3 b, t s! R6 K
– 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.;: J L1 |5 h) A5 \
-->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。 Y9 T8 g! ~. d0 m& }
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