In a high-leg delta system, what is the voltage on the high leg to neutral?

• A. 208 Volts
• B. 120 Volts
• C. 240 Volts
• D. 480 Volts

Answer: (C)

In a high-leg delta, the neutral is created by center-tapping one of the windings. That center tap gives 120 V from that center to each of the two connected lines, so two of the legs measure 120 V to neutral. The third leg, known as the high leg, is connected to the end of the other winding, and its voltage to neutral is higher because the phasor relationship between the windings adds vectorially. The result is 120 V × √3, which is about 208 V. So the high leg to neutral is approximately 208 V, while the line-to-line voltages remain 240 V.