A building is being supplied with power at 220v. The load consists of 300 lamps of 60w each and 100 fans of 40w each find (i) the total loads in kilowatts (ii) the current taken by the load ?
(i) The total load is 300 x 60 + 100 x 40 = 22,000 watts or 22 kW
(ii) To find the current, divide the load in watts by the voltage
Current is 22,000 / 220 = 100 amps
There's lots more examples like this on my other article here:
Updated on March 23, 2018
By Eugene Brennan