What is a 3-pin power socket? Structure and how to connect a simple 3-prong electrical outlet at home

Currently, 3-pin power sockets are widely used and are also the first choice of consumers. So let’s find out with Tnhelearning.edu.vn what is a 3-pin power socket? Structure and how to connect a simple 3-prong electrical outlet at home!

What is a 3-pin power socket?

A 3-prong electrical outlet is a socket with a structure of 3 holes, located next to each other in the shape of a triangle. In which, one pin connects to the cold wire, one pin connects to the hot wire, and these two pins have the same energy as a two-prong electrical outlet. But the other point is that the third pin is the ground pin and has anti-shock effect.

Why should we use a 3-prong power outlet?

3-pin socket has many advantages such as:

• Suitable for all types of plugs : Currently, most appliances often use plugs from 2 to 3 pins. The special thing is that the 3-prong power socket can be used for these two types.
• Diversity of models : Currently, on the market, there are many types of 3-pin power sockets designed with many models, designs and sizes to suit the needs of each family.
• High safety : 3-prong power socket, designed with ground wire to prevent electric shock, when the plug is leaking. Therefore, using a 3-prong socket with high safety, in addition, there are some types that are designed with additional locks to protect the holes, to ensure safety when foreign objects poke.

Structure of 3-prong electrical socket

The 3-pin power socket is composed of 3 parts:

• Hot wire pin : Is the type for the current to flow through, and performs the transmission of power from the voltage source to the user device. This is an extremely dangerous wire, because it contains a high power source up to 220V.
• Cold wire terminal : is the neutral wire, has the function of balancing the phase in a 3-phase circuit, helping to close the circuit in a single-phase circuit.
• Ground pin : It is the largest wire of the three pins, and it transmits the largest power. For the purpose of protecting users when dangerous incidents occur.

Application of 3-pin power socket

Currently, 3-prong power sockets are widely used and you can easily see them anywhere such as: Industrial buildings, schools, factories, households,…. Power socket 3 This pin is used with 3-pin plugs, and they are often attached to devices such as TVs, laptops, refrigerators, …

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Compare 3-pin power sockets and 2-prong power sockets

3-pin power socket is not balanced, and not as aesthetically pleasing as 2-prong power socket, but is used by many people, let’s find out now:

• In terms of quality : Both types are made of high-quality plastic and have very good heat resistance. But due to the structure of the 3-prong electrical outlet, there is an additional function of transmitting power to the ground, when it detects a leak. Therefore, the durability is lower than the 2-prong power socket.
• In terms of safety : 3-prong power sockets are safer, because of the grounding function, but they are quite cumbersome to install.

How to connect a 3-prong electrical outlet at home

Preparing instruments

• Schematic drawing of how to mark 3-pin electrical sockets (clearly presented between 2 and 3 pins) and switches.
• Electrical tools: Electric pliers, meter and tester, electrical tape and screwdriver.
• Switches, fuses, aptomat, light bulbs and wires.

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Pay attention when connecting 3-pin power sockets

You must follow the guidelines below to avoid risks:

• Always turn off the power source before proceeding with the installation. Do not touch the electrical outlet with bare hands.
• It is imperative to understand the principle of hot wire connected to the switch. Never invert the neutral wire with the hot wire.
• When using power tools or equipment, it is imperative to use protective equipment (rubber gloves, insulating gloves).
• Never come into contact with live electrical equipment or wires.

How to connect a 3-prong electrical outlet

How to mark an electrical outlet consists of 2 steps:

• Step 1 : Socket : There should be enough hot and cold phases. The 3-prong electrical outlet is connected in parallel. And according to the principle of 2 socket errors, do not connect to the same phase with 220V current (alternating current).
• Step 2 : Switch : Only any cold or hot phase of 220V current is allowed. The hot phase will be fed into the electrical switch. And do it by: From the socket hole to the switch pin, the other leg connects to the device you want to use electricity.

Some notes when using 3-prong power sockets

• You must make sure the plug is always plugged in straight. If the plug is wrong, you should plug it back in, never try to push the plug in.
• When plugging in and generating heat, you should disconnect all electrical systems immediately, to avoid fire or explosion.
• A 3-pin socket can be used for a 2-prong plug.

Above is the article on what a 3-prong power outlet is and how to connect a simple 3-prong electrical outlet at home that Tnhelearning.edu.vn provides you. Hope with the above information you will be successful.