Hi all
OK, so I am trying to get my preparatory work done before first fix inspection and wanted to confirm the existing cooker cable size. As I started all this before the 17th Edition, I intend to work to the 16th, as directed by the Electrical Safety Council.
So, I am looking in the On-Site-Guide at Table 1B Allowances for Diversity.
My installation will have a single 6mm cable from the CU to the kitchen loft. In the loft is a junction box to split the 6mm feed into 2 x 6mm feeds for the hob and oven. As the oven and hob are separate and more than 2m apart, I will have an individual isolator for each item.
Looking at the diversity calculation, I think my scheme will work either way but....
From a point of view of diversity and resulting current draw, should the hob and oven be treated as separate items i. e. the first 10A for each, then 30% of the remainder? Or should they be treated as "cooking appliances" as a group, with the maximum current draw combined - then the first 10A taken etc..?
TIA
Phil