You will often hear BS 7671 referred to as the . This is because the IET (formerly the IEE) has been producing wiring regulations since 1882, long before standardization became formalized.
Let’s get one thing straight: BS 7671—or as we call it in the van, The Big Red Book —is not a beach read. It is not a page-turner. It is a 500-page manifesto on why your earth rod needs to be exactly 0.5 ohms and why you can’t just "tape over that bare wire." what is bs 7671