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 expected updates to Amendment No. 3 include: Changes to earth fault loop impedances for all protective devices Earth electrode testing 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.