What is the formula for calculating the current draw from wattage and voltage on a three-phase balanced load?

To calculate the current draw for a three-phase balanced load, the correct formula takes into account the relationship between wattage, voltage, and the square root of three (approximately 1.732), which is a crucial factor in three-phase systems.

In a three-phase system, the total power (in watts) can be expressed using the formula:

Power (P) = √3 x Voltage (V) x Current (I)

From this formula, if we want to solve for current (I), we rearrange it as:

Current (I) = Power (P) / (√3 x Voltage (V))

This simplifies to the formula given in the correct answer, where amperage (or current draw) is equal to wattage divided by the product of voltage and the square root of three.

This calculation is essential for accurately assessing how much current a three-phase system will draw under specific conditions, ensuring safe and effective electrical equipment operation. Understanding these principles is vital for anyone working with commercial food equipment and electrical systems, as it affects circuit design and equipment selection.