Before you flip the switch on your new toasty 1200 W space heater, your housemat

Question

Before you flip the switch on your new toasty 1200 W space heater, your housemate cries “Stop! you will blow the fuse,” because it would run on the same circuit as your 250 W refrigerator and your 600 W dishwasher (currently running).

a) You go and check the fuse box and see the circuit in question has a 20 Amp fuse. Does your housemate have a valid concern? Verify your answer with a calculation of the current the circuit would have to carry if your turned on the space heater.

b) At the end of the month when you get your power bill, your housemate sees it has increased from the previous month by $100 and she wants you to pay the difference. You counter that she should pay too because also in this month her boyfriend started a horticultural project in the garage that uses artificial lights. You only run your heater 2 hours in the morning and 2 hours in the evening. The power company charges $0.25 per kWh. Determine your fair share of the power bill increase.

Explanation / Answer

A)Yes the housemate have a valid concern .

It appears to be something inside the heater is presumably exhausted (no doubt the blower engine ) and drawing excessively present. You can limit the cause by utilizing an ammeter hooked up in series with the positive wire of individual segments in your heater framework to test the measure of current they are drawing.for instance, the blower engine is the reason for blown circuits, the current (in Amps before the wire blows) showed by the ammeter hooked up in series with the (+) blower engine wire will most likely surpass the rating imprinted on the breakers you are introducing. This demonstrates the blower is drawing excessively present, is probably worn, and should be replaced.

Power (Watts) = Current (Amps) x Voltage (Volts)

Current = Power/Voltage

Therefore:

Fuse rating = (Power/Voltage) x 125%

Fuse rating = (Power/Voltage) x 1.25

=(1200+600+250)/240*1.25=10.6 A(within limit since the fuse used is 20A)

2)previous month usage be x

current month usage =x+100$

heater usage total 4hr=4*1200=4800 per day

so total 4.8 units in 4 hrs

1 unit=1000watts per hour

cost per day=4.8*.25$=1.2$

so for 1 months=1.2$*30=36$

100$-36$=64$*1/3=21$ SHARE FOR EACH

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