What is Electrical Switch

Introduction to What is Electrical Switch

Electrical switch is a gate for passing of electric power. In a electrical circuit, electric current or power is the flow of electrons which happens through conductors of electricity. Examples of conductors are metals like copper and aluminum. A switch acts as a gate and allows to pass these electrons through when required and stop them when not required. It is the link between two contact points - when closed it allows current to pass through. When a switch is open, it does not allow. I like to share this Electrical Resistance Definition with you all through my article.


What is Electrical Switch : Description


The simplest switch we come across every day is a toggle switch, which is an electro-mechanical switch. Such switches are used to operate the electric lamps at home.

There are several types of switches. SPST or Single Pole Single Through switch is the most common. SPTT or Single Pole Triple Through switch, DPST or Double Pole Single Through switch, DPDT or Double Pole Double Through Switch are other common types of electrical switches.

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What is Electrical Switch : Two way switches


A two-way electrical switch is used in staircase wiring. This switch can be operated either at the bottom of the staircase or n the top of the staircase. Thus, this helps in switching "ON" a lamp while climbing up the staircase and switching "OFF" the lamp after having climbed up. The actions can be reversed when climbing down the staircase - switching "ON" while on top and switching "OFF" after having climbed down.

Materials used to make an Electrical Switch are chosen based upon its electrical conductivity, non-corrosive nature, material hardness, availability, low cost and toxicity. The Electrical conducting part is a good conductor of electricity whereas the non-conducting, handling part is a good insulator. Copper or stainless steel (conductor) is used along with plastic (non-conductor) in making of a switch. Corrosion or oxidation in an electrical switch will prevent easy flow of electrons. The conductive part is usually prone to oxidation and hence it is sometimes coated with non-oxidative or noble metals to prevent oxidation.