Double device installation box for energy for BR C-profile for switch ranges. Double device installation box for parapet duct with C-profile device installation, modular, can be aligned, 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.