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发表于 2016-10-27 17:02:15
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IEC 60364-5-54:2011
543.2.3 The following metal parts are not permitted for use as protective conductors or as
protective bonding conductors:
– metallic water pipes;
– metallic pipes containing potentially flammable materials such as gases, liquids, powder;
– constructional parts subject to mechanical stress in normal service;
– flexible or pliable metal conduits, unless designed for that purpose;
– flexible metal parts;
– support wires; cable trays and cable ladders. |
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