Sounds like a pretty typical 7.2kW induction hob - same as I have at home and mine's been running off a 20A RCBO for half a decade now without any trouble (including doing many a Christmas dinner for the extended family)

I reckon diversity is applicable pretty much as normal. Diversity isn't just about the chances of things being on at the same time, but also the length of time that they're on for - as from an overload perspective things take time to heat up (both cables and protective devices). 32A for 10 mins likely warms things up less than 20A for an hour. Induction hobs actually have an advantage there - since they only heat what needs heating they have very fast heat-up times (no waiting for 5 mins for the hob itself to warm up before you can start cooking properly like the old mineral insulated spiral types) and overall lower energy consumption means their "on" times will overall be less than a traditional hob.

The difficulty the manufacturers have is that across much of Europe you can't sensibly provide a simple 32A single phase circuit as their incoming supplies are often limited to 32A or 45A per phase - so things like this are usually supplied in effect by two 16A circuits (normally from different phases) which makes diversity much less helpful. Even if you apply the traditional UK calculation (100% of the first 10A and 30% of the remainder) to 16A you still end up with nearly 12A so will end up with a 16A circuit anyway once you pick the preferred size MCB. In some other areas where single phase supplies are common (but still with a low capacity) they might need to go for a 32A circuit but you'd be expected to add load shedding to remove some other heavy loads while the hob is in use. All in all I can understand why the manufacturers just provide the blandest possible information and leave it to local electricians to figure out what's needed in their particular locality.

   - Andy.

Sounds like a pretty typical 7.2kW induction hob - same as I have at home and mine's been running off a 20A RCBO for half a decade now without any trouble (including doing many a Christmas dinner for the extended family)

I reckon diversity is applicable pretty much as normal. Diversity isn't just about the chances of things being on at the same time, but also the length of time that they're on for - as from an overload perspective things take time to heat up (both cables and protective devices). 32A for 10 mins likely warms things up less than 20A for an hour. Induction hobs actually have an advantage there - since they only heat what needs heating they have very fast heat-up times (no waiting for 5 mins for the hob itself to warm up before you can start cooking properly like the old mineral insulated spiral types) and overall lower energy consumption means their "on" times will overall be less than a traditional hob.

The difficulty the manufacturers have is that across much of Europe you can't sensibly provide a simple 32A single phase circuit as their incoming supplies are often limited to 32A or 45A per phase - so things like this are usually supplied in effect by two 16A circuits (normally from different phases) which makes diversity much less helpful. Even if you apply the traditional UK calculation (100% of the first 10A and 30% of the remainder) to 16A you still end up with nearly 12A so will end up with a 16A circuit anyway once you pick the preferred size MCB. In some other areas where single phase supplies are common (but still with a low capacity) they might need to go for a 32A circuit but you'd be expected to add load shedding to remove some other heavy loads while the hob is in use. All in all I can understand why the manufacturers just provide the blandest possible information and leave it to local electricians to figure out what's needed in their particular locality.

   - Andy.