2 AC=Alternating Current OutputOutputSpinning Wire CoilWhen a coil of wire passes through a magnetic field it produces an Alternating Current
3 AC=Alternating Current Two types of ElectricityAC = Alternating Current produced from a generator.DC = Direct Current produced from a battery.AC = ___________________RMS 120 VACWaterWheelElectricGenerator170 VoltsGround- 170 Volts60 cycles per secondGenerator contains:Coil of Wire and Magnets
4 AC Power / Voltage Generation Hydro PowerWaterWheel GeneratorSteam PowerGeneratorsFuelCoal SteamGas TurbinesNuclear ReactorsWind PowerGeneratorGeneratorSteamEngine
5 Generator Demo Generator Light 120 VAC Motor Motor Spinning Speed the GeneratorMotorSpeedControl51015VVoltageMeterAs the generator turnsfaster the voltage increased
6 Electric Generation Plants Coal, Gas, Oil-fired Steam Power PlantHydro (Water) Power PlantWind Power PlantGas Turbine Combined Cycle Plant
7 AC Power / Voltage Generation Power Plants generate Electricity at very high voltage levels to reduce cable size and voltage losses in transporting it longdistances to reach customers. It isstepped down through transformers to 240 VAC at the home500,000 VACSub StationTransformerTypes of Generating Plants______________________440 VAC240 VAC240 VAC
8 Circuit Breaker / Fuses 240 VACWhat are some AC Appliances120 VAC240 VACElectric MeterElectricBreakerBoxStove120VACElectricity from the transformer connects first through the electric meterthen through the breaker box to protect the house from overloador short conditions. A breaker box can either be a fuse or resettable breaker.
9 _______ Good ________ Off Good Circuit Breaker / FusesWhat’s the difference120 VAC inONOFFONOFF120 VAC In120 VAC Out120 VAC Out_______Good________OffGoodFusesA Fuse is like a light bulb.It will pass electricity untilit is overloaded, then the metalfuse link will burn open.A short circuit will cause an overloadCircuit BreakerA circuit breaker Is like a light switch.If it is overloaded the switch willoverheat and click open. Whenit cools down the switch can be reset.A short circuit will cause an overload
10 Show Toaster wattage rating House WiringA house is wired with heavy gauge wire to handle 120 Volts AC in orderto power high wattage devices that are found in a home. A circuit breakeror fuse is used to protect the wire from getting too hot, and possiblystarting a fire. House Items are rated in wattage, but the fuse is in amps.How do we know if we are going to overload our fuse or breaker box?Show Toaster wattage ratingMeter20 AHot wire120 VACCircuitBreakerorFuseBox20 AFour outletson one breaker.20 A20 AGround (Zero Volts)Watts = Volts * ampsAmps = WattsVoltsRefrig400 WattsToaster1200 WattsTV300 WattsMicrowave600 Watts
11 House Wiring Hot wire Ground (Zero Volts) 120 VAC Four outlets Meter20 AHot wire120 VACCircuitBreakerorFuseBox20 AFour outletson one breaker.20 A20 AGround (Zero Volts)Watts = Volts * ampsAmps = WattsVoltsRefrig400 WattsToaster1200 WattsTV300 WattsMicrowave600 WattsDetermine if the circuit breaker is overloaded. Calculate total powerRefrig Toaster TV MicrowavePower = _______ _______ _______ ______ = _______ Watts/hourAmps = watts = ______ = ________ amps Overload Yes or No _______volts
12 Electric Meter 2600 watts x 24 hours = 62,400 or 62.4 Kilo watt-hours 62.4 K watts x 30 days = 1872 K watts-hoursElectric reading from previous month 2539Reading4411Subtract previous reading from new reading for used.New Reading _4411__Previous Reading _2539__Kilowatt-hour used _1872__ X $ .10 $ __187.20__
13 Electric Meter Electric reading from previous month 5324 Reading Subtract previous reading from new reading for used.New Reading _______Previous Reading _______Kilowatt-hour used ________ X $ .10 $ _______
14 Electric Plus and WireElectrical problems are created more often by loose wire connectors than by wornor defective cords. If a cord is actually defective, it must be replaced. This is a goodpolicy always and is a requirement for buildings, because the electrical safety codeallows wire to be spliced only inside junction boxes.
15 House Wiring Demonstration LightMeterLightSwitchCircuitBreakerAC OutletDraw in a light, light switch AC outlet with plug in one outlet, Circuit breaker boxand meter.
16 House Wiring Demonstration LightMeterLightSwitchCircuitBreakerPower isSuppliedOf a 12 VoltCar BatteryAC OutletPlug andWireStudents Line up and one at a time short out wire then reset the circuit breaker
17 Electrical Wiring Example 1 Stove2 Outlets3 LightWindowWindowStoveLightOutletSetCircuitBreakerDoorIn room, draw electrical outlets, switches, and lights. Draw only one side ofelectricity called the Hot side. Also show doors and windows.3 m50 m
18 X10 Home Control Controller send commands to Meter20 A120 VACCircuitBreakerorFuseBox20 A20 A20 A12344ChimeController send commands tomodule with correct address1234Controller