Why Do Electrical Plugs Have Holes

logo by Editorial Staff | Updated on August 3rd, 2022

If you unplug any item in your home, there is a 99.9 percent likelihood that the two flat prongs are pierced.

Why are the prongs of the electrical plug have holes in them? 

shallow focus photography of white travel adapter

Three factors cause the holes:

1. So it does not fall out

If you look inside an outlet after a plug is inserted to obtain power, you’ll find that the contact wipers used to convey an electric current have small “bumps” on them. These circular parts fit snugly into the holes in the plug, resulting in a more secure connection.

This is why a well-designed plug will not just fall out of a socket but also contribute to a better connection between the contact wipers and whatever device/appliance is attached to that plug. This helps to guarantee that there are no power outages and everything works properly.

2. Multipurpose intent

Manufacturers might want to send to their consumers some warning information regarding their electronic gadget, which they will place on a tag tied to a zip tie that runs through the prongs. 

Snipping that zip tie signifies that you’ve “read the terms and conditions” in real life.

Another function for the holes is to slip a small lock, a zip tie, or any other small piece of material through them to guarantee the equipment isn’t being utilized. 

This is frequently the case, for example, in building projects. 

Companies may desire that extra degree of protection to guarantee that vagrants don’t break into the job site to steal or use a gadget while no one is watching. Hey, isn’t mileage on an item essentially stealing as well?

Also, it can be because when they manufacture these prongs, they are made through an assembly line. A hook holds these prongs so they can add insulation and coatings and insert pieces. They need to somehow how everything is in place for machines to assemble them.

3. Save money

It’s because it saves them money on raw materials in the long run. Consider the metal you acquire from those small punch-outs if you’re mass making a number of these little prongs. You then take that metal, melt it down, and probably get another “free” plug out of every 20 plugs you manufacture from that metal.


Can I use a plug that doesn’t have any holes?

Plugs are safe with or without prong holes. Type A and B plugs feature two flat prongs with a hole near the tip (often, but not always). There are two spring-action blades in certain sockets that grasp the sides of the plug pins and prevent the plug from just falling out.

What is the name of a three-prong plug?

A grounding receptacle is a three-pronged receptacle. Unlike two-prong receptacles, three-prong receptacles are grounded, which protects the electrical item plugged into it from harm in the event of a short circuit.

What is the name of a two-prong plug?

Two-pronged plugs, formerly designated as Nema 1-15 when created by Harvey Hubbell II, are now known as Type-A plugs. Ungrounded plugs are rather widespread throughout North and Central America.

Which of the two prongs on a two-prong plug is positive?

Because we use alternating current, prongs do not have a positive and negative. Instead, each of the two prongs has a ‘hot’ and a ‘neutral’ side. The larger prong is connected to the neutral wire, while the smaller prong is connected to the hot side of the circuit.

Why is one plug prong broader than the other?

To guarantee that the hot wire is appropriately tapped, (ungrounded) plugs, such as a toaster, have one prong bigger than the other. The smaller prong is hot, whereas the bigger is neutral.

What will happen if the third prong snaps?

Electricity will not flow as effectively through the gadget if one of the prongs or the wires inside them becomes loosened. Because it is no longer grounded, this misdirected current has the potential to damage appliances or even shock the person.


Editorial Staff

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