My reply was to FWL_Engineer, I wondered how he will deal with an extreme situation without using the diversity factor (curiosity). in any case thanks ban-all-sheds, it seems that i have as problem with the quoting system it would , probably save confusion[/quote]I personally always assume that at some point the appliance will work at full load, normally christmas time in the case of cooking appliances, so always wire accordingly. I look at it if you take the worst case scenario, your covered, HOWEVER, I install for others so do not have the luxury of knowing how the equipment will be used in practise.