Three-phase, three-wire delta primary and three-phase, four-wire wye secondary transformer wiring configuration. The primary side utilizes a delta connection; the secondary side features a wye connection with a neutral point. A copper equipment ground bar kit installed within the transformer terminal compartment provides individual terminals for each grounding conductor. The supply-side bonding jumper is sized per National Electrical Code 250.30(A)(2), and the equipment grounding conductor is sized per National Electrical Code Table 250.122. The system requires bonding to the electrical room ground bar, building steel, or a minimum two-inch cold water pipe, with the grounding electrode conductor sized per National Electrical Code Table 250.66.
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