18th Edition BS7671

Why you shouldn’t spend too much time on the Appendices… At the back of the 18th Edition book ‘BS7671:2018’ we have 17 appendices containing additional or supplementary information to the rules and regulations within the book. If you look though you’ll see that Appendices 11 and 12 are empty. So in fact there’s just 15 … Read more

Calculating voltage drop… You won’t find this formula anywhere in BS7671:2018 as this is another example of where G&G / EAL assume some prior electrical theory knowledge, but the formula is… Voltage Drop = (mV/A/m) x Ib x L / 1000. (mV/A/m): To find the value for (mV/A/m) we need to look in the current … Read more

The 18th Edition exam is an assessment of your ability to use the Wiring Regulations BS7671 2018 out there in the big world. As such problems and questions may not always be worded exactly as you come across them in the book. The first step to answering a real life problem or any exam question … Read more

An End to Protective Equipotential Bonding? There are some significant changes being introduced by the 18th Edition of the Wiring Regulations BS 7671:2018. Chapter 41 has arguably one of the most controversial… “Metallic pipes entering the building having an insulating section at their point of entry need not be connected to the protective equipotential bonding … Read more

A new version of the Wiring Regulations will come into effect on the 1st January 2019… The 18th Edition of BS7671:2018 Requirements for Electrical Installations (to give it its full title) introduces some significant changes to the previous 17th Edition of BS7671. This new book if all goes according to plan with the IET will … Read more