Hey guys or gals! I'm currently installing a new 400 amp 277/480 service. I'll be feeding a 240 volt, 3 phase, delta transformer for a "sub" panel fed from my I-line panel. My question is would you bond the equipment ground to the neutral in the sub panel or just do it in the transformer. I've been told to bond the the equipment ground to the bonding jumper wire in the transformer and not the sub panel but I'm not sure this is right. Any thoughts?