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Draw a household circuit having a 1200 w...

Draw a household circuit having a 1200 w toaster , a 1000 W oven a 800 W heater and a 1500 W cooler . The circuit has a heavy duty wire and a 20 A circuit breaker . Will the circuit breaker trip ,if all the appliances are operted simultaneously in a 200 V supply voltage ?

Text Solution

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The household circuit is show in the Fig . 3.9 . When all the appliances are operated simultaneously , the total power is , `P=1200+1000+800+1500=4500W` .
Now,`P=VI" or, "I=(P)/(V)=(4500)/(220)=20.45A`

But the circuit breaker is rated for 20 A. So , if all the appliances are operated simultaneously , the circuit breaker will trip .
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