In a 7200 volt 3-phase 4-wire system, what is the voltage value between phases?

In a 3-phase 4-wire system, the voltage between the phases corresponds to the line-to-line voltage. In this scenario, where the system is specified as a 7200-volt system, this value represents the line-to-line voltage, which is the voltage measured between any two of the three phases.

The relationship between the line-to-line voltage and the line-to-neutral (or phase) voltage in such a system can be described using the formula:

[ \text{Line-to-Neutral Voltage} = \frac{\text{Line-to-Line Voltage}}{\sqrt{3}} ]

For a 7200-volt system, the line-to-neutral voltage would be approximately 4160 volts, but the question specifically refers to the line-to-line voltage, which remains at 7200 volts. Therefore, the correct value for the voltage between phases in this 7200-volt system is indeed 7200 volts, confirming that the answer is accurate.

Understanding the distinction between line-to-line and line-to-neutral voltage is crucial for lineworkers, as they often encounter different voltage specifications in energized systems and must apply this knowledge in practical scenarios.