High Neutral Current - Internal Causes & Solutions

High neutral currents in buildings usually result from three situations. The first, and most common, is one where there are heavily unbalanced loads. This situation is usually easy to explain and remedy.

The second situation involves current harmonic distortion. This is where the terms "unexplained" and "excessive" come into play, since harmonic distortion changes the rules we are used to playing by.

The third issue occurs when there are multiple power systems in the facility, especially multiple service drops.

In today's environment it is increasingly likely that high neutral currents result from some combination of the three.