Vital changes are expected in Amendment No. 3 regarding safety for contractors and consumers. This essential quick-reference guide to BS 7671 will be updated to the changes expected in Amendment No. 3 to BS 7671:2008. The On-Site Guide is designed to be taken on-site for easy referencing and provides simple guidance on the application of BS 7671. All expected updates in Amendment No. 3 will be included in the On-Site Guide, which include, but are not limited to: Consumer units (to come into effect January 2016) Wiring in escape routes Changes to earth fault loop impedances for all protective devices Circuit-breakers used as functional switches Overvoltages EMC & compatibility Changes to definitions throughout the Regulations Amendment No. 3 publishes on 5 January 2015 and comes into effect on 1 July 2015. All new installations from this point must comply with Amendment No. 3 to BS 7671:2008.