Guidance Note 3: Inspection & Testing, 10th Edition

Guidance Note 3: Inspection & Testing is a fundamental guidance book for all those involved with the testing and inspection of electrical installations. It also contains essential guidance for those studying for inspection and testing qualifications and has been fully updated to BS 7671:2018+A4:2026, including identification of conductors, Stationary Secondary Batteries, Prosumers Electrical Installations, Recommended initial frequencies of inspection of electrical installations and Maximum permissible measured earth fault loop impedance (EFLI).

For those wishing to also purchase the IET Wiring Regs and IET On-site Guide (9th edition), all three books can be purchased as a bundle at a collectively reduced price of £190.

This publication is required for the following courses:

• 2921-31 Electric Vehicle
• 2391-52 Initial Verification and Inspection & Testing
• 2396 Design & Verification of Electrical Installations