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Zephyr fault voltage <br /> We are providing the following information based upon your request for the available short circuit <br /> current. Duke Energy provides the maximum short circuit current based on infinite buss on the source <br /> side of the supply transformer and minimum transformer impedance for the size and voltage installed. <br /> The short circuit current value provided would be the utility design maximum fault current available <br /> based upon a bolted fault at the point of delivery. <br /> Reference Location: <br /> Referenced Service Duke Energy Utility Location ID: 8622356 <br /> The calculated maximum available short circuit current requested at the <br /> point of delivery for the above referenced service location is as follows: <br /> (Short Circuit current in RMS symmetrical Amperes) <br /> Single-phase <br /> 2018004 A <br /> (line-to-ground fault) <br /> Transformer Information: <br /> Transformer kVA 50 kVA <br /> Transformer Voltage 120/240 <br /> Transformer percent impedance 1.50 %Z <br /> Transformer X/R ratio 1.54 X/R <br />