Answer / thavasik

Neutral is used to make the circuit complete.

Earth is used to protect the instruments or whatever from electrical shock.

Ground is used to bypass the electrical leakages

Answer / ehtesham ali khan

Ground or earth in a mains (AC power) electrical wiring system is a conductor that provides a low impedance path to the earth to prevent hazardous voltages from appearing on equipment (the terms "ground" (North American practice) and "earth" (most other English-speaking countries) are used synonymously here). Normally a grounding conductor does not carry current.
Neutral is a circuit conductor (that carries current in normal operation), which is connected to earth (or ground) generally at the service panel with the main disconnecting switch or breaker.
In a polyphase or three-wire (single-phase) AC system, the neutral conductor is intended to have similar voltages to each of the other circuit conductors. By this definition, a circuit must have at least three wires for one to serve as a neutral.

Answer / automation

Read all about grounding / earthing

http://jobselectricalengineers.blogspot.in/2015/11/grounding-earthing.html

Answer / simon peter

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