This document represents a variant of the CEI EN 60309-4: 2008-07 Standard; Standard that applies to independent products which combine in a single casing a fixed or mobile socket, in accordance with EN / IEC 60309-1 or EN / IEC 60309-2, and an interruption device with rated operating voltage not greater than 690 V in direct current or alternating current, frequency not exceeding 500 Hz and rated current not exceeding 250 A, intended for industrial use indoors or outdoors.