What is Voltage Drop?
Voltage drop is defined as the amount of voltage loss that occurs through all or part of a circuit due to impedance.

Rule#1 Algebraic variations
Using basic algebra, you can apply the same basic formula to find one of the other variables (I, D or CM) if you already know the voltage drop.

Suppose you want to know what size conductor you need to reduce the voltage drop to the desired level. Simply rearrange the formula.

For three-phase, it would look like this:
CM (3 phase) = 1.732 x K x I x D/VD

For single-phase calculations, you would use 2 instead of 1.732.

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