The objective of a power quality audit is to find a solution to a problem. This is accomplished by checking wiring and grounding, which causes about 80% of most commercial and industrial problems, and checking the quality of both the internal and external voltage. This data is then used to determine an appropriate solution.

In conducting an audit, the power quality professional must find answers to four questions:

  1. Does the facility's wiring and grounding meet code? and is it adequate from a power quality standpoint?
  2. What is the quality of the ac voltage supplying the equipment?
  3. What is the impact of the electric utility's power system?
  4. What solutions are indicated by the audit data?

This last question is, of course, the most important. The best outcome of any power quality audit is whether the problem was solved.