Wiring of light and fan circuit using one-way and two-way switches.

Experiment No: – 04

Title of the experiment: –

Wiring of light and fan circuit using one-way and two-way switches.

Objectives: –

To be written by student.

Apparatus Required: –

Sl. No.	Name	Specification	Make	Quantity
01	Mica sheet switch board	6cmx10cm		1 no.
02	Fan	1200 rpm, 5A, 250V		1 no.
03	Fan Regulator			1 no.
04	Batten holder	plastic		1 no.
05	Led bulb	9W, 250V		1 no.
06	Fuse-Carrier	5A, 250V		1 no.
07	Two-way switch	5A, 250V		2 nos.
08	One-way switch	5A, 250 V		2 nos.
09	Tester			1 no.
10	Wire cutter			1 no.
11	Connecting wire	PVC insulated copper		as per required

Circuit Diagram: –

Theory: –

We use switches all the time in our homes, offices, cars, industries and many other places. The gadgets we use daily (mobile phone and laptop) consists of several switches. A Switch is an electrical device which is used to open or close an electric circuit. There are different types of switches: Toggle Switch, Momentary Switch, Rocker Switch, Digital Switch, etc. All the switches perform simple task of either interrupting the flow of electric current or divert the flow of current. They essentially ‘make’ or ‘break’ the circuit. All the switches we use regularly to turn on or off lights, fans, etc. are two terminal devices. But there is a special switch called ‘Two Way Switch’, which is the an important component in the implementation of Staircase Lighting. It is a standard single pole double throw switch with three terminals. The following image shows the front and back view of a typical household two-way switch.

The three terminals are usually named COM, L1 and L2, but sometimes the terms COM, 1 Way and 2 Way are also used. In one position, the COM and L1 terminals are connected, while in the second position, the COM and L2 terminals  are connected. This type of connection is typically called a “Break before make” design, as the first connection has to be broken before making the second connection. This is in contrast to a regular two terminal switch, which is just a make or break device.

Procedure: –

1. Connect all the apparatus as per circuit diagram.
2. Choose proper color codes for phase, neutral & earth connection.
3. Make sure that all terminals should be tighten properly.
4. Connect to main supply for checking.

Observation: –

Switch 1 COM (connected to)	Switch 2 COM (connected to)	Status of Light
L1	L1	ON
L1	L2	OFF
L2	L1	OFF
L2	L2	ON

Precaution : –

1. Before connection of main supply check all connection should be in proper terminals.

Conclusion: –

Written by student.