Why is the ground prong longer than the other two in a plug?

Why is the ground prong longer than the other two in a plug?

Among these three pins (live, neutral and earth), the earth pin is made longer and thicker than the other two pins, so that when we insert the plug into the socket, the earth pin comes into contact with the power supply before the other two pins, this is because if any unwanted charges are there then they will be …

Why does earthing wire has maximum diameter?

Explanation: The main reason of giving earthing to a electrical or electronic equipment is to protect human from electrical shock. In case of short circuit the amount of current is so higher so the earthing cable size should be in higher size to withstand the current generated from the line cable.

Why do appliances need to be earthed?

To provide a level of protection against electric shock, a system known as the protective earth incorporated in the wiring circuit of buildings and some appliances. The purpose of the earth is to protect the user of a defective electrical appliance from electric shock.

Why is earth Pin longer and thicker?

The earth pin is long so that the earth connection is made first. This ensures the safety of the user because if the appliance is defective, the fuse will blow off. The earth pin is made thicker so that even by mistake it cannot be inserted into the hole for the live or neutral connection of the socket.

How the earth pin is connected in the appliances?

How the Earth pin is connected in the appliances: In a 3-pin plug, the wire that is connected to the ground pin of a plug is also connected to the metal body of the equipment. If any current leakage is appearing on the metal body of the equipment then, it must be discharged safely to ground.

What is Earthing or grounding?

Earthing (also known as grounding) refers to contact with the Earth’s surface electrons by walking barefoot outside or sitting, working, or sleeping indoors connected to conductive systems, some of them patented, that transfer the energy from the ground into the body.

Why is ground wire thick?

The resistance R of a conductor is inversely proportional to its cross-sectional area. Hence a thicker earth pin increases its cross-sectional area, which makes the earth pin low resistive. Also, the wire connected to this earth pin must be of low resistance to make a complete low resistive conductive path.

What are the different sizes of earthing?

Earth Bonding Cable Size Selection

Line Conductor or Neutral Conductor of PME supplied mm2 70
Earthing Conductor not buried or buried and protected against corrosion and mechanical damage mm2 35
Main Protective Bonding Conductor mm2 25
Main Protective Bonding Conductor for PME supplies (TN-C-S) mm2 25

What is earthing of an appliance?

i) Earthing of an electrical appliance means the outer casing of appliance is connected by means of a wire which is then connected to a cu-wire which is connected to earth. This is known as earthing of an electrical appliance. It is essential to save a person from total electrical shock.

Why are some electrical appliances not earthed?

Some appliances, such as vacuum cleaners and electric drills, do not have an earth wire. This is because they have plastic casings, or they have been designed so that the live wire cannot touch the casing. As a result, the casing cannot give an electric shock, even if the wires inside become loose.

Share this post