Continuity Wiring Test for Earth Connection

Continuity Test for Earth Connection Points : Continuity Wiring Test for Earth Connection Another test that has to be taken on completion is to as certain the resistance from the farthest point of the conduit or cable sheathing to earth, which must not exceed (1Ω). Every earth continuity conductor must be checked to as certain that it is mechanically and eclectically continuous. The impedance of the earth-continuity conductor is sufficiently low to enable a satisfactory earth-fault current to pass to operate the protective devices.

If the installation is done to using the steel conduit system then the electrical continuity is also essential in conduits. Two leads are used for performing this test. The one lead is connected to meger ‘E’ terminal end the other end of this lead is connected to the farthest point of the conduit.

The one terminal of the second lead is connected to the megger ‘E’ terminal and the second terminal of this connected to the nearest point of the steel conduit. Turn the megger handle, if the megger shows the zero ohms resistance, it means continuity is present and if megger shows the infinity ohms, it means there is no continuity present between the conduits.