The ADVANCE-GRP[EX] series surface mounting interlocked socket outlets are designed to guarantee excellent mechanical resistance to impacts and chemical agents, even under extreme atmospheric and temperature conditions, thanks to the glass-fiber reinforced polyester used (GRP) and to the high thickness of the walls of the casing, obtained by SMC technology which makes it practically indestructible. Reliability and resistance make ADVANCE-GRP[EX] sockets the most suitable products for applications in the food and industrial sector in the presence of an explosive atmosphere linked to combustible dusts. The external fixing points and the ample internal wiring space make it easy to install these sockets, which are also equipped with a mechanical interlocking system of the plug and a switch disconnector to guarantee connection and disconnection operations in complete safety. The series of ADVANCE-GRP[EX] interlocked sockets must only be used with the plugs of the OPTIMA-EX series