How do you test an electric bell with a megger?

To better understand how to perform this test, it is important to understand what a megger test does.

A megger traditionally utilizes a relatively high voltage {500vdc} to detect minute leakage current in an insulator or conductor. These "pinhole" leaks lead to current arcing and eventually an electrical short to the frame of the device.

In the case of a bell, you would connect one lead to the metal frame of the bell and the other to either of the bell wires. The result of the test should be infinity or an open circuit.