GEK-S device installation duct suitable for mounting directly on the wall or on wall brackets. Fastening is done via the standard holes in the duct. The GEK-S device installation duct has a continuous C-rail for holding a partition made of sheet steel or plastic and for fastening the device installation boxes. The potential equalization between the lower parts is done via the coupling. The protective measure and potential equalization between the upper part and the lower part is ensured by the patented self-contacting duct cover. This connection is created without any additional wiring effort, as the locking clips for this are already pre-assembled in the upper part. The device installation box is installed without tools. All surface switch programs from the EGS built-in device systems can be installed in the GEK-S device installation duct. The system opening is 110 mm.