Institution of Engineering & Technology On-Site Guide (BS 7671:2018)

On-Site Guide (BS 7671:2018) (Electrical Regulations)

Requirements for Electrical Installations, IET Wiring Regulations, Eighteenth Edition, BS 7671:2018+A2:2022 (Electrical Regulations)

Guidance Note 3: Inspection & Testing: 4 (Electrical Regulations)