Entrance Fittings are quick connectors that power the entire Flex raceway by converting the building mains power to the Flex 4-circuit power system. The Surface-Mounted Entrance Fitting starts at the wall and is used when power/data cabling is running OUTSIDE the wall. It is attached to a flexible steel conduit that is pre-wired and available in three lengths (3', 15', 30'). The flexible conduit includes a 1/2" knockout fitting and typically connects to a junction box in the wall or ceiling. All surface mounted Entrance fittings come with a wall channel kit that encases the conduit in an aluminum extrusion.