Sierra FS46660 Dual Bus Bar - 6 Gang 150 Amp The Sierra FS46660 Dual Bus Bar is a versatile stepped bus bar featuring different heights with each bar for more flexible wiring. The removable connecting link gives this bar even more versatility. Removing the link combines the negative and positive buses conveniently on a single bus block. This bus bar features a glass fiber reinforced Nylon base to ensure great mechanical strength and durability. The tin-plated copper bus allows currents up to 150