You may also want to consider dedicated, non-rcd protected circuits for things like fridges, freezers, IT Equipment, Smoke alarms. If you do this, you will need to consider that cables supplying these circuits, buried less than 50mm, will need mechanical protection, either by using earthed conduit, or by using cable which meets the requirements of BS8436, such as this: http://www.screwfix.com/p/2-x-2-5mm...tracking url&gclid=CKSPls66_bgCFU_MtAodu1EAuQ
