Eaton main fusible switch, 600A, Copper, NEMA 3R, Overhead, Class T, 100 kAIC, Four-wire, Three-phase, Barrier kits: 400A-800A fusible switches: bottom feed-3MFSBBK, top feed-3MFSTB, 120/208V, (2) 4 AWG-600 kcmil