Abstract: A connector keying system includes a receptacle (3) assembled at one end of a first electrical cable and a plug (4) assembled at the end of a second electrical cable and designed to be connected to the receptacle. The system includes:—at least one coding ring (1) capable of being at least partially assembled around the receptacle (3) and including a plurality of guide notches (P) and a keying recess (12),—at least one keying plate (2) capable of being attached to the plug (4) and including a keying lug (22) capable of being inserted into the keying recess (12) of the coding ring (1).

Abstract: A sealed wall feedthrough including a cylindrical assembly sleeve fixed and sealed in an opening of the wall, a cylindrical penetration module including joints ensuring the seal arranged on the periphery of its outside face, the module being able to transfer travel into the cylindrical assembly sleeve and includes locking with at least two annular grooves cut into the periphery of the inside face of the assembly sleeve.

Abstract: A sealed wall feedthrough 1 comprising a cylindrical assembly sleeve 3 fixed and sealed in an opening of the wall 2, a cylindrical penetration module 8 comprising means 11 of ensuring the seal arranged on the periphery of its outside face, the said module 8 being able to transfer travel into the cylindrical assembly sleeve 3 and comprising a first means of locking 12 consisting of at least two annular grooves 12a-12b cut into the periphery of the inside face of the assembly sleeve 3.