接地导体及其连接的电阻 信息技术设备 安全第一部分:通用要求 GB 4943.1-2011,
IEC60950-1(ed.1):2001 IEC60950-1(ed.2):2005 IEC60950-1(ed 2.2):2013 EN60950-1:2006+A11:2009+A12:2011 AS/NZS 60950.1:2015,UL 60950-1-2014 2nd Edition,CAN/CSA C22.2 No. 60950-1-07, 2nd Edition 2014-10 2.6.3.4