A switch is a device that is used to operate any electrical fixtures to two conditions i.e ON & OFF. The operation of the switch is achieved by metal contact. The metal used in this case could be copper, brass or aluminium. The most used metal in electrical materials is copper as it is very good conductor of electricity. In this page we will be discussing about in depth detail of the electrical switch.
What to consider before buying switches?
Electrical switches are designed to operate the metal contact safely by placing it into thermosetting plastic enclosure. Before we make decision to select the switches, we should look at the type of switches available in Indian market.
Electrical switches come in varity of sizes and styles but we will look at the popular ones.
1) One way switch
The one way switch is most commonly used electrical switch that is used everywhere. It has two operations ON state and OFF state, while ON is the state where connected load like light, fan, plug socket etc. turns ON and in OFF state it goes OFF. The simple one way switch is shown in below picture with front view, side view and back view.
The image above shows is the front view, side view and back view of the modular switch. As seen in the picture the one way switch has only to contacts on back as one is connected with load and other connected as seen in the ‘Switch connection section’ on this page.
2) Two way switch
The two switch is used where single load (i.e light, fan, motor etc) operated from two different locations. It can be identified by the two marking on the switch and three terminals on back. The three dimensional view shown below:
3) Bell Push Switch
The bell push switch has same operation as one way switch but this switch does not remains on ON state permanently, it has spring operation means it can only ON until the user pushes.
Difference between modular and non – modular switches
The difference between modular and non-modular switch is that the modular switches fit on the module plate with just self-locking system where in traditional non-modular switchs need screws to lock it on the plate. The below image shows both modular and non-modular swtiches.
Connection of the different types of the switches
Understanding the terminal connection is one of the major part in electrical wiring as wrong connection would lead to short circuit or fire. The manufacturer doesn’t cover any mechanical breakdown on the product. The following section will show how to make connection between terminals of the electrical switches.
One Way Switch
Two way switch
Quality Examination of Switch
The quality of any switch has to be checked before making connection so we have provided some point to be consider during this examination.
- Look for ISI mark on the product.
- Check whether the operation of the switch is smooth or hard, if found hard then it needs to be replaced because the internal contact must be damaged.
- Only buy branded products s they have quite a long warranty.
- Make sure the terminal screws are properly screwing.