EC&M Tech Talk — The Why, What, and How of High Potential (HiPot) Testing

Sept. 3, 2024

Randy demonstrates how to safely use a high potential test set (HiPot) as he conducts an AC Dielecrtic Withstand Test.

In this EC&M Tech Talk, Randy Barnett, NFPA Certified Electrical Safety Compliance Professional, demonstrates how to safely use a high potential test set (HiPot) as he conducts an AC Dielecrtic Withstand Test.

Here is the Tech Talk in a nutshell:

After a brief introduction into the terminology of the topic, Randy demonstrates the how-to side of safety when it comes to performing any test at greater than the insulation rating of the equipment.
The difference between the dc Insulation Resistance Test and the High Potential Test are presented, then a dc insulation resistance test is performed.
Important References are presented.
The AC Dielectric Withstand Test basics are explained.
A dc Insulation Resistance is performed on a 460 vac motor.
An AC Dielectric Withstand Voltage Test is performed on the AC motor. Closeups of the HiPot screen shows how to setup the test set.
Various HiPot applications bring the Tech Talk to a close.

If you have a need to learn what high potential testing is all about, or just want to learn more about testing methods, viewing this EC&M Tech Talk can be of great benefit.

About the Author

Randy Barnett | CESCP

Randy Barnett is an NFPA Certified Electrical Safety Professional, a long-time journeyman electrician, instructor and author with expertise in industrial electrical construction and maintenance. He is Electrical Codes & Safety Manager for NTT Training. Because of his ability to develop and deliver quality programs, Randy has trained more than 10,000 students in all 50 states, including Canada, Singapore, Afghanistan, Dubai, Trinidad, and Saudi Arabi. His articles appear in numerous trade publications and, his book on "Commercial and Industrial Wiring" is used as an entry-level text in many electrician training programs. Randy also appears at various corporate and trade association speaking engagements and consults on training program design and implementation. Randy is a graduate of the U.S. Navy Nuclear Power School, served as a nuclear electrician in submarines and holds a B.S. in business.