Connecting devices. Electrical copper conductors. Safety requirements for screw-type and screwless-type clamping units, General requirements and particular requirements for clamping units for conductors from 0,2 mm$u2 up to 35 mm$u2 (included)— 32 стр.
Classification of environmental conditions. Classification of groups of environmental parameters and their severities, Stationary use at weatherprotected locations— 48 стр.
