Earthing, How to Measure Earthing Resistance by Earth Tester


A good earthing allows the faulty current to pass to the ground easily through conductors. Before charged electricity to an installation or a machine earth connection must be present there. Number of earth connections will be depending on the connected phase (i.e. one earth connection for single phase and two earth connections for three phase … Read more

Insulation Resistance Tester, How to Test Insulation Resistance by Megger

Insulation Resistance

Insulation resistance tester or megger is used to measure insulation resistance of wire and cable. It can check continuity also. The megger is a most important instrument for electricians.  Before and after laying the cables, check the insulation resistance. According to I.E. rules the insulation resistance should not be less than one Meg-Ohm. What is … Read more