GenTran 300660 30-Amp 6-Circuit Manual Transfer Switch for Generators up to 3750-Watt (Discontinued by Manufacturer) UL Listed and meets National Electrical Code requirements Can be expanded to up to 16 circuits-just upgrade it instead of replacing it Uses standard, off the shelf circuit breakers for easy replacement or expansion Versatile design allows for flush or surface mounting next to your load center and accommodates hardwiring or plug-in generator connections Accommodates arc-fault and GFCI breakers required by come jurisdictions to meet new NEC requirements