Exp No 9 House Wiring and Circuit PDF

Progressive Education Society’s MODERN COLLEGE OF ENGINEERING (An Autonomous Institute Affiliated to SPPU) Shivajinagar, Pune – 411005 Department of Mechanical Engineering Subject : Manufacturing Practice Workshop...

Progressive Education Society’s MODERN COLLEGE OF ENGINEERING (An Autonomous Institute Affiliated to SPPU) Shivajinagar, Pune – 411005 Department of Mechanical Engineering Subject : Manufacturing Practice Workshop (MEC05102) First Year B.Tech (2024 Patt.) Academic Year : 2024-25 Semester : I Name of Student: __________________________________________ Roll No. : _________________________________________ Class : ____________ Division : __________ Branch: ____________ Experiment No: ____________________________________________________ Title: __________________________________________________________  Experiment No. 9 Title: Study of house wiring and making simple electric connections Aim: To study house wiring connections and practice to make simple electric connections to make electric extension board or to operate lamp with 2 way switches. House wiring Basics of House Wiring 1. Electrical Service Connection and Meter Home electricity starts with the power service and electric meter. The meter measures the amount of electricity your home uses and is the basis for the charges on your electric bill. The meter runs only when electricity is used in the house. 2. Disconnect Switch Some home electrical systems include a dedicated disconnect switch that is mounted on an outside wall of the home near the electric meter. In the event of a fire or flash flood, or if work needs to be done on the system, a disconnect switch allows you to shut off the power from outside the home so you don't have to enter the home to turn off the power. 3. Main Service Panel After passing through the meter, your electrical service feeds into your home's main service panel, commonly known as the breaker box. Two large "hot" wires connect to big screw terminals, called lugs, inside the service panel, providing all the power to the panel. A third service wire, the neutral, connects to the neutral bus bar inside the panel. 4. Main Circuit Breaker The service panel contains a large main breaker that is the switch controlling the power to the rest of the circuit breakers inside the panel. It is sized according to your home's service capacity A main breaker of 200 amps will allow a maximum of 200 amps to flow through it without tripping. In a tripped state, no current will flow to the panel. 5. Branch Circuit Breakers The breakers for the branch circuits fill the panel (usually below) the main breaker. Each of these breakers is a switch that controls the flow of electricity to a branch circuit in the house. Turning off a breaker shuts off the power to all of the devices and appliances on that circuit. If a circuit has a problem, such as an overload or a fault, the breaker automatically trips itself off. 6. Devices Devices are all the things in the house that are connected to electricity, including switches, receptacles (outlets), light fixtures, refrigerators, furnaces, and water heaters and appliances. Devices are connected to the individual branch circuits that start at the breakers in the main service panel. 7. Switches Switches are the devices that turn on and off lights and fans in your home. They come in many different styles and colors to suit your design needs. There are single-pole, two-way, three-way, four-way, and dimmer switches. When you flip a switch off, it "opens" the circuit, meaning the circuit is broken or not complete and the power is interrupted. When the switch is on, the circuit is "closed," and power flows beyond the switch to the light or another device it is controlling. 8. Outlets Electrical outlets, technically called receptacles, provide power to plug-in devices and appliances. Televisions, lights, computers, freezers, vacuums and toasters are all good examples of devices that can be plugged into an outlet. Standard outlets in a home are either 15-amp or 20-amp; 20- amp outlets can provide more electricity without tripping a breaker. 9. Wiring Home’s wiring consists of a few different types of wiring, including nonmetallic cable (commonly called Romex), Box cable, and wiring concealed in conduit. NM cable is the most common type of circuit wiring. It is suitable for use in dry, protected areas (inside stud walls, on the sides of joists, etc.) that are not subject to mechanical damage or excessive heat. Simple House Wiring Diagram: This diagram shows how to make a Simple House Wiring. In this circuit, we have used two lights, a ceiling fan, a DP MCB (Double Pole Miniature Circuit Breaker), three switches, two power sockets, and a fan regulator. Components needed For this Project: 1. DP MCB 20A 2. Gang Switch 3. Fan Regulator 4. CFL Light 5. Gang Socket 6. Ceiling Fan 56-Inch Fig. Simple House Wiring Making of Electric extension board Aim: The main purpose of this experiment is to enable students fabricate an electrical extension board. Moreover, after doing this, students will also learn to identify the live, neutral and earth wires and corresponding terminals of electrical sockets and plugs. Extension board consist of 1. Wooden or plastic box, 2. Electric wire, 3. Switches 4. Sockets, 5. Plug - (15A) Assembling an Extension board The basic activities involved in assembling the extension board are to wire switches, sockets and plugs in accordance with a circuit diagram. Stepwise Procedure: 1. Mark the positions of switches and socket on the switch board. 2. Cut the holes on the switch board for housing switches and socket, as per marking. 3. Fix the switches and socket on the switch board. 4. Make the wiring of switch board as per wiring diagram. 5. Also, connect proper earthing connection as per wiring diagram. 6. Make sure that all the connections are as per wiring diagram and are tight. 7. Test the switch board. Circuit Diagram Fig. Extension Board Connections Making electric connections to operate a bulb using two-way switch Aim : To make electric connections to operate a bulb using two-way switch. 2 way switching means having two or more switches in different locations to control one lamp. They are wired so that operation of either switch will control the light. This arrangement is often found in stairways, with one switch upstairs and one switch downstairs or in long hallways with a switch at either end. Technically a two-way switch is known as Single Pole Double Through (SPDT) Switch. Fig. 2-Way Switch Required Components for Two-Way Switch Connection Experiment  2-way switches x 2  Bulb x 1  AC supply x 1  Connecting wires Fig. 2- way switch wiring Diagram