o 관련규격 - IEC 60364-4-41 (2005) : Low-voltage electrical installations - Part 4-41 : Protection for safety - Protection against electric shock - IEC 60364-5-54 (2005) : Electrical installations of buildings - Part 5-54 : Selection and erection of electrical equipment - Earthing arrangements, protective conductors and protective bonding conductors - IEC 60449 amendment 1 (1979) : Amendment 1, Volt.....
