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How to check earth resistance with megger?

How to check earth resistance with megger?

Answer

To measure earth resistance using a megger, you need to:

1. Connect the conductor under test to the L terminal of the megger.

2. Connect the E terminal of the megger to the earth.

3. Apply the test voltage for about a minute till a steady reading is obtained.

4. Record the insulation reading.

5. When the handle of the megger earth tester is rotated at a uniform speed, it directly indicates the earth resistance on the dial or calibrated scale.

6. Obtain a set of readings by burying the electrode P at various positions.

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