Table of Contents
Why is the earth pin is bigger in size?
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.
Why is the earth wire thicker?
For Low resistance So an earth connection should have electrically low resistance compared to the remaining conductive paths. 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.
Why is the earth pin longer in a 3 pin 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 …
What is the earth pin for?
Plugs
| Features of a plug | Function |
|---|---|
| Neutral wire | Copper wire coated with blue plastic that also connects to the cable in the wall and completes the circuit |
| Earth wire | Copper wire coated in striped plastic that provides a path for current to flow from the case of the device to the ground if there is a fault |
Why is the earth pin not the same size?
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 do two pin plugs not have an earth?
The vacuum cleaners and electric drills do not have an earth wire. They have plastic casings or they have been designed so that the live wire can’t touch them. Even if the wires inside become loose, the casing can’t give an electric shock.
Why is earthing wire thin?
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.
What is the difference between earth and neutral?
The major difference between the two is, Earthing provides a grounding point and neutral provides a returning point to the flow of electricity.
Is the earth important in a plug?
A plug connects a device to the mains electricity supply….Plugs.
| Features of a plug | Function |
|---|---|
| Earth wire | Copper wire coated in striped plastic that provides a path for current to flow from the case of the device to the ground if there is a fault. |
Why is the earth pin bigger in size?
The Earth pin is made larger in three-pin electrical plugs as a safety feature. Being bigger, it is the first to make contact as plugs are pushed in, and last to break contact as plugs are pulled out. This means any short circuit of the casework of the appliance is lead to Earth… (called “ground” in USA)
Why is the ground pin bigger than the plug?
The ground pin is longer so when you insert the plug, the earth connection is made to the equipment first. When you remove the plug, the earth connection is removed last. This is for the user safety. It is bigger so you can not insert the plug in any other way.
Can a earth pin be inserted into a socket upside down?
Though it is impossible to insert the plug into the socket upside down, one may try to insert the plug top in a misaligned position (for e.g. trying to insert the earth pin into the phase socket with the other two pins further down out of the socket).
When does the earth pin disconnect from the plug?
The earth pin is the last to disconnect from the socket when removing the plug from the socket. i.e. Line and Neutral disconnect first and then the earth pin.