P
pushrod
I know diversity can be applied to a cooker for working out the current demand. Along the lines of first 10 amps plus 30% of the rest plus 5 for a socket outlet.
However, what if an electric hob and cooker are seperate but supplied on the same radial. Does diversity apply to each separately or to the overall total. For example if they were rated at 5kW and 7 kW respectively and you apply diversity to each then total current approx would be 30A but if you apply it to the total 12kW then diversity says the cable calc could be based on approx 23A. Quite a difference.
This is just a theoretical question to know what is the correct answer. I know in practice you would err on the side of caution and use a cable and protection that would leave a bit of spare capacity.
However, what if an electric hob and cooker are seperate but supplied on the same radial. Does diversity apply to each separately or to the overall total. For example if they were rated at 5kW and 7 kW respectively and you apply diversity to each then total current approx would be 30A but if you apply it to the total 12kW then diversity says the cable calc could be based on approx 23A. Quite a difference.
This is just a theoretical question to know what is the correct answer. I know in practice you would err on the side of caution and use a cable and protection that would leave a bit of spare capacity.