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 supplying 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 that is grounded back to the main panel, bonding xo in the transformer with #8 back to the gec.
