Device installation box 1-way energy for BR C-profile for switch ranges. Device installation box for parapet duct with C-profile device installation, modularly stackable, increased installation depth for flush fitting with the upper part of the parapet duct, vertical and horizontal device installation possible. Device retaining screws in quick-thread design. Tool-free mechanical locking in the parapet duct. For accommodating installation devices up to 250 V / 16 A with support rings and 60 mm fastening track. For use with frames of commercially available installation switch programs.