A rail-mounted lift system includes a rail (102) having at least one conductor (114a,114b) positioned on an upper interior surface (130) of the rail. A carriage (106) may be slidably disposed in the rail for relative movement to the rail. The carriage generally includes a carriage body (140), at least one pair of support wheels (144) rotatably coupled to the carriage body and slidably engaged with the rail, and a conductor truck (146) comprising at least one conductive roller (156) rotatably attached to the conductor truck. The conductor truck may be mounted to the carriage body with a biasing member (168) upwardly biasing the conductive roller into rolling engagement with the at least one conductor. A lift unit (104) may be coupled to the carriage body and includes a motor (133) paying out and taking up a lifting strap (108). The lift unit is electrically coupled to the at least one conductive roller.
