How Do You Use A Megger?
Use a Megger to test the insulation on a grounded wire or between the conductors on a circuit board. Testing the grounding system for hospitals, business parks or any other kind of facility can help prevent electrical surges. As with any type of current, lightning storms find the least path of resistance and always hit the ground. Learning to use a Megger continuity tester can reduce the likelihood of electrical damage to a facility. Clamp a pair of ground testers on the grounding rod in the facility you wish to test. This is sometimes called the grounding cable. The facilities manager, architectural engineer or electrician can tell you where the grounding rod is located. Wind the handle of the generator on the Megger at about 160 turns per second. One clamp will measure for the voltage, and the other clamp will measure the current. The Megger indicator will show the ground loop resistance at the grounding rod in the facility. Usually, a technician will multiply the number of grounding
