Megger
Megger is a company "Megger Group Limited" and it is referring to a Megometer, it is a test of the insulation properties of such things as electric wiring, motor windings and high power antenna mounts. We use a "megger" or "meg out" electrical wiring and equipment to see if it is shorted to ground in any way. The megger uses much higher voltages to check resistance than a normal Volt-ohm meter.
On the whole megger testing is non destructive. What happens is a DC voltage is applied to the device or winding under test. It is an insulation test to see is the insulation has been injured in any way to cause a short circuit when normal power is applied to it. Applying the proper voltage is essential to not damaging the device you are testing. So meggering a device is non destructive if you use the tester as its instructions tell you to.
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