Why is the ground pin of a 3-pin plug longer and bigger than other pins?

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.

What is the reason that ground pin are made of greater diameter in the plugs?

To break contact with the earth point in the power socket after line and neutral while removing the plug. This ensures personal safety until the line and neutral are disconnected. Larger pin provides less resistance to current flow. Hence more fault current can be passed to the ground on the occurrence of a fault.

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 is the earth pin not the same size as the other two pins?

First reason, to prevent the wrong way to operate a 3-pin plug and connected electrical machine for the safety purpose. In other words, 3-Pin plug wont be connect to the socket upside down as the earth pin is thicker, so it won’t adjust and fit in another slot made for Neutral or Live Pin in the socket.

Why is the earth pin longer than the others?

Why it is Longer? The earth pin should be the first to connect and the last to disconnect with electric supply. This is why earth pin is longer than the live and neutral pin on 3-pin plugins. The earth pin is the last to disconnect from the socket when removing the plug from the socket.

What is the difference between 2-pin and 3 pin plug?

The main difference between a two-prong outlet and a three-prong outlet is that a three-prong outlet has a ground wire, while a two-prong outlet doesn’t. Your hot wire delivers electricity to the outlet while the neutral wire sends the electricity back to the main electrical panel.

Why do UK plugs have 3 pins?

Prong Design: Like standard U.S. grounded plugs, the U.K. wall plug has three prongs. The U.K. plug is designed so that the grounding prong is slightly longer than the prongs responsible for transferring current.

Why is ground wire longer?

The pin connected to the earth wire is thicker and longer than the pins connected to neutral and live wires in a plug, because The earth pin is longer so that the appliance is first earthed. The earth pin is thicker, so, that even by mistake it cannot enter into the live hole of the socket.

Why are there 3 pins on a plug?

This is used when the appliance has a metal casing to take any current away, in case if the live wire comes in contact with the casing. A 3-pin plug consists of three pins (hence the name). The 3-pin plugs are designed so that electricity can be supplied to electrical appliances safely.