What is the Megohmmeter commonly called?

• A. Megger
• B. Multimeter
• C. Ohmmeter
• D. Volt-Ohm Meter

Answer: (A)

The main idea is that a megohmmeter is named after a widely used instrument for testing insulation resistance. It measures very high resistance (in megohms) by applying a high test voltage, which helps determine how well insulation is protecting against leakage. Because the original insulation testers came from a brand called Megger, electricians often shorthand the device as a megger, and the term stuck as the common name for insulation-resistance testers.

A general multimeter measures several quantities like voltage, current, and resistance, but not specifically insulation resistance at high voltage. An ohmmeter measures low resistance to check continuity, not high insulation resistance. A volt-ohm meter combines voltage and resistance testing but isn’t the usual term used for insulation resistance testers. Thus, the commonly used name for a megohmmeter is megger.