Abstract: A system for building at least one electrical device into a wiring conduit whose depth is less than the depth of the device includes at least one support which can be fixed in the conduit and receives the electrical device(s) so that a front face of the device or each device is flush with a front face of the conduit via an opening formed in corresponding relationship therein. The system further includes at least one pattress which is passed through an opening formed in corresponding relationship to it in the bottom of the conduit to form therein a recess for accommodating a rear part of the device. The pattress is separate from the support and has its own means for fixing it to the conduit.

Abstract: A box for building an electrical device into a wiring conduit whose depth is less than that of the device includes a lateral envelope delimiting an interior volume to receive the device, closed at the rear by a back and open at the front and provided with means for fixing it into the conduit so that, passing through a hole formed in the back of the conduit, the box and the device that it contains project to the rear of the conduit. The box receives the electrical device within its interior volume and has a line of weakness to enable a lateral portion to be detached along a lateral cut edge delimiting a lateral communication opening by which two identical boxes truncated in this way can be joined together to form a box with a larger interior volume to receive a plurality of devices or a larger device.

Abstract: A system for building at least one electrical device into a wiring conduit whose depth is less than the depth of the device includes at least one support which can be fixed in the conduit and receives the electrical device(s) so that a front face of the device or each device is flush with a front face of the conduit via an opening formed in corresponding relationship therein. The system further includes at least one pattress which is passed through an opening formed in corresponding relationship to it in the bottom of the conduit to form therein a recess for accommodating a rear part of the device. The pattress is separate from the support and has its own means for fixing it to the conduit.

Abstract: A variable covering device for electrical wiring conduit includes two semi-rigid material portions attached to each other by an arrangement forming a hinge, wherein at least one variable aperture notch is formed between those portions near the hinge and the notch is filled or covered by an attached closure member adapted to enable angular adjustment of the two portions relative to each other by the hinge.