The IET PIETGN3184 is Guidance Note 3: Inspection & Testing, 10th Edition, fully updated to BS 7671:2018+A4:2026 for current inspection and testing practice. Published by the IET in paperback format with ISBN 978-1-83724-048-7, it provides essential working guidance for those involved in the inspection and testing of electrical installations and for learners studying inspection and testing qualifications. Update areas highlighted by the IET include identification of conductors, stationary secondary batteries, prosumers electrical installations, recommended initial frequencies of inspection and maximum permissible measured earth fault loop impedance.