Reliance Controls Corporation 306C Pro/Tran Indoor Transfer Switch Indoor surface mount transfer switch designed for fast installation in residential and commercial applications Maximum generator running watts: 7,500 Maximum single-pole circuits: 6, Maximum double-pole circuits: 3 16-inch flexible conduit whip attaches easily Features rugged powder-coated steel cabinet with six combination 1/2-inch and 3/4-inch knockouts and 1-inch interchangeable circuit breakers