The electrical feed cylinder electrically feeds and supports the trac within 2-1/8-in of the mounting surface. The cylinder includes heavy gauge beryllium copper contacts and integral screw terminal connections that accept up to a 10-ga solid wire. The wiper-action contact system simplifies installation. 1 Close-to-Ceiling Electrical Feed Cylinder required per 25 A circuit. Integral canopy mounts directly over a standard 4-inch outlet box.