Important changes to the eic and eicr forms make guidance note 3 inspection testing a priority for all those carrying out inspection and testing on electrical installations additional changes to this book from the updates to amendment 3 include changes to earth fault loop impedances for all protective devices earth electrode testing amendment 3 published on 5 january 2015 and comes into effect on 1 july 2015 all new installations from this point must comply with amendment 3 to bs 7671 200