The 5 kva control transformer is being fed from the mcc panel with two #12 and a ground on a 10 amp fuse, its leaving the mcc with grounding type sealtight, and returning to the mcc with the same type sealtight supping one 20 amp fuse to fed the computer,and one 20 amp fuse for printers. Do I still need grounding bushing if so what size wire, and do I need a ground back from xo to the main ground bar in the mcc, bonding xo in the transformer with #8. Also the main bonding will be done on a 2"x1/4 buss bar, can the buss be mounted with spacers on 3/4 plywood.
Last edited by lite bulb; 11/24/14 10:20 PM.
