Reversing Motor Starter Contactor Copper Power Bar Jumpers Star Delta Mixed LotUsed. Power bars for a reversing motor starter or a star delta starter setup. (6) of the curved bars 5 3 8" hole centers (3) of the bent like a handle jumpers. 5 3 8" hole centers (3) of the locked rotor jumpers 1 5 8" hole centers. All holes are 11 32" or oversized 5 16" These are Tined copper. Was used with a 152 amp motor starter.