HD 384.4.47 S1-1988 建筑物的电气装置.第4部分:安全防护.第47章:安全防护措施的应用.第470章:概述.第471节:电击防护措施
Electrical installations of buildings; part 4: protection for safety; chapter 47: application of protective measures for safety; section 470: general; section 471: measures of protection against electric shock