Hi,
installing a new outside light. (500W halogen, PIR) Easiest install is to the lighting ring in the loft (easy access to wires and to outside)
However, my calculations are as follows - tell me if I'm right?
total lighting load at present:
spotlamps in bathroom and stairs: 4x50W (max) = 200W
other single lights (presume someone puts 100W bulbs in to be on safe side): 3x100W = 300W
Total: 500W
then add in 500W PIR light to get 1000W total for circuit (which is a ring for upstairs lights direct from the CU) which gives (at 230V) just over 4A, which is fine for a 5A circuit, yes?
I guess I need to check the wiring is actually at least 0.75mm but it will be if the fuse is 5A I guess.
Is there anything I've missed or is it safe?
Thanks
Andy.
installing a new outside light. (500W halogen, PIR) Easiest install is to the lighting ring in the loft (easy access to wires and to outside)
However, my calculations are as follows - tell me if I'm right?
total lighting load at present:
spotlamps in bathroom and stairs: 4x50W (max) = 200W
other single lights (presume someone puts 100W bulbs in to be on safe side): 3x100W = 300W
Total: 500W
then add in 500W PIR light to get 1000W total for circuit (which is a ring for upstairs lights direct from the CU) which gives (at 230V) just over 4A, which is fine for a 5A circuit, yes?
I guess I need to check the wiring is actually at least 0.75mm but it will be if the fuse is 5A I guess.
Is there anything I've missed or is it safe?
Thanks
Andy.