Question

what is local earthing

Answer 1

In an electrical installation an earthing system or grounding system connects specific parts of that installation with theEarth's conductive surface for safety and functional purposes. The point of reference is the Earth's conductive surface.

Answer 2

Explanation:

In electrical engineering, ground or earth is the reference point in an electrical circuit from which voltages are measured, a common return path for electric current, or a direct physical connection to the earth. Electrical circuits may be connected to ground for several reasons.