2. Then you must find out how many Watts the appliance will use. Most appliances have a sticker on them that will tell you this information. For instance, look at the light bulb. You can get a 60 W light bulb which uses less watts than a 100 W bulb.
3. Next find out how many Volts of electricity the outlet produces. In most wall outlets are
120 V.
4. Use the formula A = W/V You then divide the amount of Watts by Volts and your finished product is the amount of Amperes your appliance uses. So a 60 W bulb divided into 110 V from the outlet = 0.54 W/V or 0.54 A.
That would not blow the fuse. But there are probally a number of lights or plug fixtures attached to one circuit. You have to find out how many appliances and calculate the number of Amperes each appliance uses. Then you add them together and see if it will overload the circuit. If the amount is under the number of Amps your fuse box holds, you're ok. If not, you may blow a fuse!!