An outdoor bus duct rated at four thousand amperes, two hundred seventy over four hundred eighty volts, three-phase, four-wire with housing ground and one hundred percent neutral connects to utility infrastructure. All requirements must be coordinated with Pacific Gas and Electric prior to installation. A one hundred six-inch by ninety-inch utility transformer pad is specified, with dimensions and requirements confirmed through the utility service planner. Two five-inch conduits with conductors route from the connection, requiring exact electrical verification prior to rough-in with no exceptions permitted.
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