What Is a Megohmmeter Check?

A megohmmeter, or megger, is a device used to test electrical and insulation resistance. This is usually done by sending a high-voltage signal into the object being tested, typically a wire or motor.

What's a megohmmeter used for?

Megohmmeters provide a quick and easy way to determine the condition of the insulation on wire, generators, and motor windings. A megohmmeter is an electric meter that measures very high resistance values by sending a high voltage signal into the object being tested.

How does a megohmmeter work?

The megohmmeter, or megger, is a measuring device that tests high electrical resistances. ... A megger will read a wire or motor windings in Megohms, where 1 Megohm is equal to 1,000,000 ohms. In order to read such a high resistance value the meter must be capable of generating a very high voltage.