Connector 2 and 3 Poles (Definite Purpose)

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1 review for Connector 2 and 3 Poles (Definite Purpose)

  1. 5 out of 5


    Connectors with 2 and 3 poles are essential components used in various electrical and electronic applications, offering a secure and reliable means to connect multiple wires.

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  • Number of poles 2 and 3 Poles
  •  Rated voltage 125V
  •  Rated current 15A
  • Material PVC
  • Application Cable Joint
  • Installation instructions come packaged with each part

Numerous connector types have been employed in electric bicycle systems but connector 2 and 3 poles are frequently used in all their specifications.

An electromechanical gadget that is recognized as a connector is used to establish an electrical connection between several electrical circuits or between components of an electrical system to combine them into a single, bigger circuit.

There are two types of materials used in connectors. Insulators and conductors. Contact resistance, conductivity, mechanical strength, formability, and resilience are crucial for conductor materials. Insulators must be strong in electrical resistance, able to sustain high temperatures, and simple to fabricate for a precise fit.

Here, we’ll discuss connector 2 and 3 poles in detail.

Terminology For Connector 2 and 3 Poles

Let’s examine the terms used to explain connectors before we begin our discussion of several frequently used connections.


A connector’s gender indicates whether it plugs in or is plugged into, and it is usually male or female. Each side of a pair of matching connections or fasteners is typically named male or female in electrical and mechanical trades and manufacturing. In most cases, the female link is a container that stores and accepts the male connector. Other terms, like jack, plug, and socket, can be used occasionally, more in electrical links.


There is usually just one way to connect connections. This characteristic is known as polarity, and linkages with safeguards against incorrect connections are referred to as polarized, or occasionally keyed.


 The connector’s business component is represented by Contacts. These are the metal pieces that come into contact with one another to create an electrical connection.

What Is Meant By 2-Pole?

When the connector is described as a 2-pole, it usually includes two electrically conducting pins and is not earthed.

At first, all electrical equipment had 2-pole plugs installed, which meant that none of the equipment was earthed and that all main sockets were designed to accommodate 2-pole plugs. However, the likelihood of getting an electric shock increased as more and more strong equipment was produced. The solution to this issue was to add an earth connection, mostly in the form of a third pin. Thus, even though this is not quite accurate technically, earthed plug systems are referred to as 3-pole systems.


2-pole connectors are the standard for less powerful devices (often less than 500 watts) because they can be produced more cheaply.

Two distinct power (or signal) sources can be connected to two different circuits using a 2 pole switch, which typically has four terminals. When the switch is activated, TWO circuits are connected or disconnected as opposed to simply one.


2-pole plugs are not made to tolerate strong currents continually. For example, under certain circumstances, damage from smoldering or burning may occur if more than 2.5 amperes, or more than 500 watts, are passed through a 2-pole connector. This is because the plug pins, which are frequently too thin to withstand the heat generated by the higher power, are to blame.

What Is Meant By 3-Pole?

A device connector named a 3-pole is earthed and often includes three pins, two of which are used for current transfer and one for personal safety.

The issue of a potential electric shock became a concern for users in the 1930s due to the prevalence of more powerful equipment (often exceeding 500 watts). 3-pole connectors for these devices needed to have an earth connection installed to ensure safety. This earth connection was installed as a third pin in all plug types. 


It is important to remember that cutting off the earth connection poses a risk to life because there would be no defense against electric shock. This earth connection has been created as a leading connection in all 3-pole connectors that meet standards; this implies that the earth connection closes the contact before the other two pins make power contact.

It is also possible to link three distinct “source” circuits to three distinct “destination” circuits using a 3 pole connector. Three separate circuits are served by the six terminals that this switch normally has.

The ground wires are an essential component of the system, and 3-Pole Connector plugs and jacks are manufactured to precise specifications to offer quick, reliable connections between thermocouples and extension wires. Perfect for 3-wire RTD applications as well.

At the same time, 3-pole earthed sockets, which can accommodate both connector 2 and 3 poles, have largely replaced 2-pole main sockets in most nations across the world.

  • Cons 

    The breaker will not perform as intended, which is a disadvantage. The only method to determine how the breaker will behave is to test it with a circuit breaker tester.

    One leg of a 3-pole breaker is often run through two poles in series when using one on a single-phase system.

    Here’s an overview of the most important devices which use connector 2 and 3 poles.

    Devices that are lower power (less than 500 watts) include 2-pole:

    • Charging stations for USB-capable devices such as mobile phones, iPods, and iPads, 
    • electric toothbrushes 
    • hair straighteners
    • coffee makers 
    • navigational tools
    • cameras for videos, etc. 

    Devices with more power (500 watts and higher) are often 3-pole:

    • PCs
    • laptops
    • hairdryers
    • kettles
    • vacuum cleaners
    • power drills
    • televisions 
    • irons 

    Final Words

    In summation, connectors are essential for creating connections made with electricity in a variety of devices. This article has focused on connector 2 and 3 poles. Because they are more affordable, 2-pole connectors are typically used for less powerful devices but are inappropriate for high currents. On the other hand, 3-pole connectors—which are grounded for safety—are made for stronger equipment and protect against electric shocks. 3-pole connectors replaced 2-pole main plugs. The overview of devices using connectors 2 and 3 poles emphasizes the importance of considering the device’s power consumption when choosing the appropriate connector.


A connector is a tool used to connect two pieces of pipework, wire, or equipment.

A grounding wire is present in 3-pin outlets but not in 2-pin outlets. Three-pin outlets are far safer than two-pin outlets since they have this grounding wire.

A single-phase, one-pole, or two-pole load can be served by a three-pole breaker. But you can’t serve two loads with one breaker.