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The earth, or ground, pin on a 3 pin plug is a connection to safety ground. It is intended to be connected to the chassis of the appliance, in such a way that operational current neverflows on that conductor. The intention is that, if hot were to become shorted to chassis, then fault current would flow and the protective device in the distribution panel would trip. This works because ground and neutral are connected together in the distribution panel, and only in the distribution panel. It is also possible that, if the circuit is protected with a GFCI (Ground Fault Current Interrupting) protective device, then even slight imbalances between hot and neutral, i.e. partial current flow on ground, would trip the protective device.
The earth, or ground, pin on a 3 pin plug is a connection to safety ground. It is intended to be connected to the chassis of the appliance, in such a way that operational current neverflows on that conductor. The intention is that, if hot were to become shorted to chassis, then fault current would flow and the protective device in the distribution panel would trip. This works because ground and neutral are connected together in the distribution panel, and only in the distribution panel. It is also possible that, if the circuit is protected with a GFCI (Ground Fault Current Interrupting) protective device, then even slight imbalances between hot and neutral, i.e. partial current flow on ground, would trip the protective device.

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Q: What does the earth pin do on a 3 pin plug?
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When 3 pin plug is used?

To fit a 3-pin socket. The three pins are live, neutral and earth, which must not be confused.


When use a 3-pin mains plug what is the biggest pin for?

On a UK three pin plug the two smaller prongs are Live (brown) and Neutral (blue). The Larger pin is for the Earth wire. This can prevent you getting an electric shock


Why third pin is plastic in 3 pin plug?

Double-insulated electrical appliances, such as electric drills, only require two connections -a line and a neutral- to the supply. An earth (ground) connection is unnecessary. In the UK, all electric socket outlets have shutters that blank off the line and neutral terminals when there is no plug inserted. These shutters are operated by the earth pin of the plug. As double-insulated appliances don't require an earth connection, a plastic earth pin is moulded into the plug in order to open the socket shutters in place of a normal metallic earth pin.


Which plug is safe to use in the 3 pin plug?

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Is the UK 3 pin plug used in Eire?

Both use the same kind of 3 pin plug.


How do you clean a 3 pin plug?

We can clean 3 pin plug by cotton or by ear buds vijay sasthry


What happens without the third pin from a 3 pin plug?

Third pin is for body earth to protect humans using that particular equipment. Its nothing in a indian home. But as an engineer i say its compulsory


What is the function of 3 pin plug?

The 3 pin plug is used to connect (and eventually disconnect) various devices requiring an AC power supply to and from the main power supply.As the name suggests, the 3 pin plug consists of three pins :-Longer one, usually on the top for most standard plugs : is the earth [ E ]Left pin (Usually) : is the Line connection [ L ]Right pin (Usually) : is neutral [ N ]Next to the pins, on the plug, the three pins and their respective function is given by E, L and N.


Which wire is not present in a 2 pin plug?

The earth wire.


What pin on the plug to the AC outlet is the ground pin and what is its purpose?

The ground pin or earth pin is the uppermost pin on your plug. It's purpose is to provide a safety barrier between you and the supply in the event of an overload or in case of an accident.


Is it okay to use an adapter to change a three pin plug into a two pin plug?

No, it is not ok, it is potentially very dangerous because the two-wire cable has no earth with it. The earth wire is an important safety component that comes with a three-pin plug. An exception can be made for certain low-power appliances that have double insulation. This includes TV sets, radios, and table lights provided the mounting is plastic and not metal. These appliances are commonly sold with a twin-wire cable but often with a three-pin plug on the end of it. The three-pin plug in this case often has a plastic 'earth' pin and it is safe to replace it with a two-pin plug.


What is the third prong in plug for?

On a British plug it is the earth pin connected to the earth wire. This is safety feature to stop electric shock