I am planning the lighting circuit for an extension to my house and could do with some help on calculating the circuit load and cable sizes.
I currently have 10 lights on a separate upstairs lighting circuit. This is protected by a 6A breaker.
The missus has a grand design plan of adding another 13 50 watt spotlights in the extension but I have concerns on whether a new 10A breaker will be required and what size cable will be needed.
How can i calculate the size of the breaker required and what safety factors are required to be added into the calculation?
I am also concerned that the size of the cable i was intending to use (1.0mm2) may need to be uprated? How do i calculate what size cable is required?
Sorry for the long topic.
Many thanks for your help.