![]() ![]() If there is any serious fault on the equipment, it also makes the fuse blow, hence protecting the user. It will prevent the users from any electric shock while using the equipment. If any current leakage is appearing on the metal body of the equipment then, it must be discharged safely to ground. ![]() 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. ![]() How the Earth pin is connected in the appliances: Almost all new electric appliances these days, come with a complete fitted 13 Amp 3-pin plug. It is imperative to ensure that electrical equipments can operate under these situations before putting their plugs into the electrical outlets. Most 3-pin electrical socket outlets can tolerate maximum current upto13 amperes (A). The Earthed instruments require a third pin to provide the Earthing connection in case of insulation failures, while unearthed instruments use safeguards such as double insulation. As already stated above, appliances such as AC, refrigerator and washing machines do require an Earthing connection, as it is not easy to design these instruments without the chance of safety hazards in case of any failures, while instruments such as mobile phone chargers do not require a third Earthing pin because they have simple construction and possess double insulation in their design. There are earthed instruments and unearthed instruments. This type plug is commonly used for heavy appliances such as the air-conditioners. It can be fitted into local 3-pin socket with plastic adapter. These class II electronic devices operate on low current and do not require being earthed/ grounded. This type of plug is generally used for class II electronic devices such as TVs and DVD players. It also works as a safeguard for insulation failures These appliances need to be earthed/ grounded to avoid the risk of electrocution in case there is an electricity leakage to the metal body. This type of plug is generally used for class III electrical appliances such as refrigerators, microwave ovens and especially those with metal bodies. Let us examine the reasons of this also after studying the table below: A Question-2: Have you also have ever wondered why some appliances use a 2-pin plug and others have 3-pin plug? Appliances such as TVs and DVD players, mobile phones use a 2-pin plug, while other appliances such as refrigerators, microwave ovens, ACs use a 3-pin plug Each wire has its own specified color, as shown above and each pin must be correctly connected to the three wires in the electrical cable. The 3-pin plugs are designed so that electricity can be supplied to electrical appliances safely. It is important to know how to wire a 3-pin plug correctly. 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.Ī 3-pin plug consists of three pins (hence the name). The EARTH wire is represented as GREEN & YELLOW this is the route the electric current takes when it exits an appliance it is for this reason the neutral wire has a voltage close to zero. The electric current routes out through the Neutral wire, i.e. ![]() This is connected to a fuse on the live pin, the electric current routes through the live wire. Below is a schematically representation of a plug with its colored wires. By Putting a screwdriver anywhere near the holes on a mains wall socket, one might get a shock of life from the electricity!īefore we discuss the uses of the 3-pin plugs any further, let us first understand the basic concept of the plug and wires. Now, as long as a good solid connection was made, all have remained well and then somebody must have given you a mature advice, Please Do Not Do It! In any case we should not start pushing metal objects into the mains plug holes. I am sure, majority of you must surely have. Question -1: How many times, have some of you poked the earth lever with a screwdriver, pen or other object to insert the plug and push the pins into the live and neutral? Now, in this article to begin with we will pose two questions to our general readers/ audiences.
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