What are the basic voltages that can be taken off of a 4 wire 208 volt system?

In a 4 wire 208 volt system, the configuration typically consists of three phases and a neutral, commonly referred to as a three-phase, four-wire system. The main voltages that can be derived from this type of system involve both the phase-to-phase and phase-to-neutral voltages.

The primary voltage available from phase to phase in a 208 volt system is 208 volts. This is significant in industrial and commercial applications where three-phase power is commonly utilized.

When referencing the phase-to-neutral voltage, it is calculated by dividing the phase-to-phase voltage by √3 (approximately 1.732). Therefore, the phase-to-neutral voltage in a 208 volt system is approximately 120 volts.

This means that you have:

• 208 volts between any two phases (this supports three-phase equipment),

• 120 volts between any phase and the neutral (ideal for standard lighting and single-phase circuits).

Thus, the voltages that can be taken off this setup are indeed 208/120, which enables the use of both three-phase and single-phase equipment effectively. This is why the option stating 208/3/60 and 208/120/1/60 is accurate, as it reflects both the three-phase and single