how to apply diversity

paulthemagpie · Mar 14, 2012

hello peeps,

how do we apply diversity to a load? I have checked in the 7671 and it meantion we can apply it but doesnt deterine what value we apply it at?

regards

magy

telectrix · Mar 14, 2012

you apply diversity to a circuit. e.g. if you have 10 sockets on a circuit, each can theoretically pull 13A, so that's 130A! as all will not be on at the same time, or actually pulling 13A, then you apply diversity, say a 75% reduction > around 32A. showers, though, no diversity is allowed. cookers have their own diversity rule.

Ryan Kavanagh · Mar 14, 2012

what would a cooker diveristy rule be? or is that determined by the manufacture and varies depending on the manufacture

Jay Sparks · Mar 14, 2012

Hi Ryan,

Look in the OSG page 110, tables A1 and A2. These will give you the allowances for diversity. For a cooker it states,
First 10A then 30% of the remaining current. So if the manufacturer states say 3kw, then you would do 3000/230 is
13A, so first 10A plus 30% of the remaining 3A. If the cooker Iso has a soket on it you would add 5A to your total.

Jay