The Throw indicates the number of contacts in a switch. A Pole represents the number of operations controlled by a single switch. The controlling operation of a switch can be defined by its “ Pole” and “ Throw“. and so on.Īs a switch is used to control the ON & OFF operation of the device, the various types of switches are designed for different applications based on the characteristics, properties and features of switches. staircase wiring, corridor & hallway wiring, hostel wiring, godown wiring, tunnel wiring, hospital wiring etc. Additionally, Intermediate switches (4-Way switch) are used to control the lighting from two different locations e.g. Similarly, a two pole (2-Way Switch) can be used to control two circuits or two operations of a device. For example, a single pole switch can be used to control the OFF and ON operation of a light bulb. There are multiple applications of switches such as basic light and toggle switches for ON and OFF operations for lighting points, fans, computers, printers, blowers in the residential and commercial buildings, automobiles, computers & mobiles, robotic and sensitive aerospace and military applications.Īs there are multiple types of switches which are used for different and designed applications. switch is ON hence the light bulb is ON and glowing.Īs switches play an important role in the controlling systems, this way, you may notice them everywhere even for tiny devices as well as large appliances. On the right side, the contacts of the switch are closed e.g. the contracts of switch are open) hence the light bulb is OFF. In fig (left side) the switch is OFF (i.e. In simple words, a switch is used to control the circuit operation by activating or deactivating the whole or certain parts or processes of a connected circuit.Ĭonsider the following basic circuit diagram showing the working and controlling of ON/OFF operation of a light bulb. In other words, an electrical switch is a controlling device, which interrupts the flow of electric current or changes the direction of current in a circuit.Īlmost all the electrical and electronic systems use at least one switch to control the ON and OFF operations of the device. 2PMT & 2P6T (Two Pole, Six Throw & Two Pole, Multiple Throw)Ī switch is a device which is used to make or break an electric circuit automatically or manually.
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