GOST R 50571.5.54-2013 Low-voltage electrical installations. Part 5-54. Selection and erection of electrical equipment. Earthing arrangements, protective conductors and protective bonding conductors
2013GOST R 50571.5.54-2013 Low-voltage electrical installations. Part 5-54. Selection and erection of electrical equipment. Earthing arrangements, protective conductors and protective bonding conductors