calculate the maximum working current?

Question

of a mixed circuit consists of 1 power outlet rated 1500 watts and 5 lighting points rated at 30 watts and is connected to a 240 volts supply?

Answer 1

The total power out put is the sum of 1500W outlet and the 30 Watts of lighting points - or 150 watts if it's for each lighting point.

P=IE P=Watts I=Amps E=voltage
Substitute and use: I=240/1530 (or 1650 if the lights are 30 W ea)