Why ground pin’s length and diameter is more than the phase pin in a 3 pin plug?

In an AC power plug, the earth pin is longer and of larger diameter as compared to the live and neutral pins. 5a_3_pin_plug_large_1

This arrangement performs mainly three functions.

Reason 1

Since the earth pin is longer, it is the first pin to establish contact when all three pins (earth, active and neutral) are inserted into a socket. It is also the last pin to be disengaged. The longer earth pin provides a return path before the live pin engages. This way short circuited appliance will simply trip a circuit breaker instead of electrocuting the user.

Reason 2



main-qimg-c2026641d7f7c6ba4195b7ffc24b0fd0-c

Many wall sockets have shutters on the live and neutral lines to prevent children from inserting conducting materials which may result in electric shock. Insertion of a longer pin helps in opening the shutters, facilitating the insertion of other two pins.

Reason 3 (As requested, technically speaking)

More the thickness of the conductor, less is the resistance path for the current to be grounded. This is for the safety against shock. The leakage current, if any, will take the less resistant path through the earth pin to ground rather than through the person operating the appliance.

One more reason is it fixes the plug tightly so it also prevents loose connection.

Latest

Data Breaching and Hacking Preventions

Recently,  number of cases of getting Credit card or bank account hacked has grown too much. So, probably this is a great time to talk…..

What is the largest possible Size of a Single File?

Kids from 2000s, you may not remember a time before a 120 GB hard drives were the bare minimum, but other of you from 90s…..

File Systems: What is FAT and NTFS? Which one is better?

You probably know someone, who is always miss placing stuff, I do personally. Whether they can not find their keys in the morning, they leave…..

App Review: MoveIt – transfer Media Files Automatically

From the title of the blog, you will think that, what is new in that? But well, there are some features in this you will…..

Status Forever: Android App to get Status for every mood

Are you looking for new Status to put on your Social media account? Whether you are feeling sad or true love, you will get all…..

Vivo Y69: Review and Specifications

The Chinese smartphone manufacturer Vivo always try to give you good and better Camera. Which is boring in a way. You just don’t get any…..

Apple iPhone X: Top 5 Features, Dream Project of Apple

If you have followed Apple at all, you have probably heard the old cliche that it does things better, instead of doing them first. Nowhere…..

How AHCI or IDE Modes can affect the Drive Performance?

When you finally decide to address a huge bottleneck in your computer by upgrading to an SSD for your Boot drive. But when you finally…..

Technical Terms that you don’t have an Idea of being Misused

Using the word Bacteria to refer to a single germ, which should be bacterium instead, mixing up Discrete and discreet and saying my Facebook got…..

How Important System32 Folder is for Windows OS?

Warning! Deleting this file can cause damage to Windows or another Program. Odds are pretty high that you have seen a message like that, if…..

Samsung Galaxy Note 8 First Impression: Do Bigger Things

Last year’s Galaxy Note 7 was perhaps “the most famous Samsung smartphone in history”, for all the wrong reasons. The company kicked off its recovery…..

Top 6 Upcoming Smartphones of 2017

2017 has been an incredibly exciting year, when it comes to smartphone launches. But that doesn’t mean, it will not get even better. So, Let’s…..

Mobile Networks: Evolution from 1G to 4G Explained

Most of us uses smartphone with 3G or 4G mobile networks, well mostly 4G after Jio Storm. But do you ever think what does it…..

Lenovo K8 Note: New Killer Note is ready to Kill the Ordinary

Chinese Mobile manufacturer Lenovo made a great success with their Lenovo K series. Especially with Lenovo K3 Note, Lenovo K6 Power and Lenovo K6 Note……

Moto’s Flagship Moto Z2 Force: Review and Specifications

Motorola’s best smartphone for 2017 is a thin, classy-looking handheld with a long-lasting battery. It’s compatible with Moto Mod accessories, and sold at a fair…..

Vivo X9s Plus Overview and Specifications

Chinese Smartphone Manufacturer Vivo has making quite the market in India from two to three years. Vivo has risen to the top in trusted mobile…..

Xiaomi Redmi Note 5: Full Specifications and Leaked Details.

Chinese Smartphone Manufacturing Company Mi created many record with their Redmi Series in India. As you are aware of Xiaomi Redmi 4, which is a…..

How does Optical Character Recognition (OCR) works?

You know, it is pretty easy to take words on your computer screen and put them on a physical sheet of paper. Just click print…..

Micromax Evok Note Review: Really Invincible?

Micromax is literally failing to make their mark on smartphone market again. There was a time when Micromax did shook every smartphone companies with their…..

Wireless 802.11 ac Wave 2 Explained

It seems like the onward march of Wireless technology can not be stopped. I mean we keep flinging more and more stuff through the airwaves,…..

  • Get more stuff like this
    in your inbox

    Subscribe to our mailing list and get interesting stuff and updates to your email inbox.