Phoenix Contact 2907993 A bus bar for TMC 82... is designed with circuit breakers that have a two-phase configuration, featuring a 17.8 mm pitch and can accommodate up to 56 positions. The bus bar is rated for an end feed current of 80 A and can handle voltage levels of both AC and DC up to 600 V, while also being UL 508 listed for connection with UL 489 rated circuit breakers.