The ADVANCE-GRP[GD] wall 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 housing, obtained by SMC technology which makes it practically indestructible. Reliability and resistance make ADVANCE-GRP[GD] sockets the most suitable products for applications in the oil & gas, chemical and pharmaceutical industries. The external fixing points and the wide internal wiring space make it easy to install these sockets, which are also equipped with a mechanical interlocking system of the plug and a non-sparking switch disconnector to guarantee connection and disconnection operations in complete safety. The series of ADVANCE-GRP[GD] sockets must only be used with the plugs of the OPTIMA-EX[GD] series.