PQ3606 60A 600V 3P without Ground stab, Square D I Line II Busway Plug. Instead of running wire the entire distance throughout the factory floor, busway systems enable all the power to run down the bus and Bus Plugs are used to drop power to any specific location/machine along the way without having to run wire for every machine individually. Using long cables also suffers from power drop, where busway has minimal power drop, motors run stronger and cooler. PQ3606G is a switch operated fusible bus plug and use Class J or H fuses. Operate with 8 hook stick #515608.