A single household circuit is connected to three electrical outlets (all in parallel). The outlets are connected to three devices: an 800-W electric kettle, a 60-W trouble light, and a 1,000-W toaster oven. If all three appliances operate at the same time, will the 15-amp fuse of the circuit trip?
yes or no ?

Question

A single household circuit is connected to three electrical outlets (all in parallel). The outlets are connected to three devices: an 800-W electric kettle, a 60-W trouble light, and a 1,000-W toaster oven. If all three appliances operate at the same time, will the 15-amp fuse of the circuit trip?
yes or no ?

radar · Answer

First calculate the total wattage.  Addition

radar · Answer

Next make an assumption:  That all devices are 120 volt units, and the outlets furnish 120 volts.  Note that this is a good assumption in the U.S.A., but would not be good in Germany or many other countries.

radar · Answer

Now dig up the formula for power, the one that relates power to volts and current (amps)
P=VI or IV   Now solve for I (current)
I=P/V

radar · Answer

Does I exceed 15 amps (yes or no)

anonymous · Answer

Yes ?

radar · Answer

Total watts being consumed: 800 + 60 +1000 = 1860 watts
I=1860/120 = 15.5 Amperes that exceeds the rating of 15, so yes fuse opens up or circuit breaker will trip open.

anonymous · Answer

thank you sir

radar · Answer

You're welcome, and good luck with your studies.