BS7671 and Earthing A to Z
Earths / Protective Conductors are the most important conductor on any installation and that’s why it’s also one of the most important Chapters in the 17th Edition. Chapter 54 Earthing Arrangements and Protective Conductors. From the various supply arrangements; TN-S, TN-C-S and TT which describe how an installation is earthed through to what can be … Read more