What is the use of ground pin in a 3 pin plug explain elaborately .?

Question

What is the use of ground pin in a 3 pin plug explain elaborately .?

Answer 1

In a single phase system an earth or ground is used to connect all devices that will have power on them. Normally the earth is connected to the body of that unit normally made of metal. To get an earth point connected on a kettle say you need to have a point to connect to and that is the earth terminal on the plug point.

There are many types of plugs and sockets they plug into and they have an earth too.

An earth connection can be used to reduce static or it can be used to shield cables from noise sources.

The best purpose of the earth pin is to make sure there is an earth so that when there is a live wire loose and touches the body it will trip the earth leakage. Also if there is a good earth and you touch the live wire and earth the earth leakage will trip. If you only have a live and neutral and get between them you will probably not be able to tell many people about it. So it is there for your safety.

Answer 2

Ground in a mains electrical system is a conductor that provides a low impedance path to the earth to prevent hazardous voltages from appearing on equipment. Normally, a ground pin does not carry current. Neutral is a circuit conductor that may carry current in normal operation, and is sometimes connected to earth (especially in older appliances). The idea of an earth in a AC system is that there is a path to ground via a conductor within the wiring, rather than the possibility that such a failure may result in the voltage attempting to find ground through other means - most destructively, via a person..

Answer 3

The ground pin does exactly what it sounds like - it connects to the ground. The purpose of this is to dissipate excess charge. Without it charge can build up on the object and either damage it or discharge and harm the user.