What is the phase to neutral value of a 12470 volt 3-phase 4-wire system?

In a 3-phase 4-wire system, the line-to-neutral voltage can be determined from the line-to-line voltage using the formula:

[

V_{\text{phase}} = \frac{V_{\text{line-to-line}}}{\sqrt{3}}

]

In this situation, the line-to-line voltage is 12,470 volts. By applying the formula:

[

V_{\text{phase}} = \frac{12470V}{\sqrt{3}} \approx 7200V

]

This calculation shows that the phase-to-neutral value, or line-to-neutral voltage, in a 12,470-volt 3-phase 4-wire system is approximately 7,200 volts. This understanding is critical for linemen, as it informs them about the voltage they will encounter in the phase conductors relative to the neutral point, aiding in safe working practices and proper system design.

The other options do not represent the phase-to-neutral voltage accurately when calculated from the given line-to-line value.