If i had 480 volts that is read between phases what would be the single phase voltage value read between a single-phase to ground?

In a three-phase system, the line-to-line voltage (480 volts) can be related to the line-to-ground (or phase) voltage using the formula: ( V_{phase} = \frac{V_{line}}{\sqrt{3}} ). Therefore, the single-phase voltage value read between a single phase and ground would be approximately ( 480 , \text{V} / \sqrt{3} ), which is about 277 volts.