E
Engineer54
Just think of the millions upon millions of circuits that were designed, installed, and have been working for donkeys years to the previous max Zs values!! Now many or i would even say most of the actual Zs values would have been much lower, but those say close to, or right in the limit of those previous max Zs values are now deemed non compliant!! ...Bloody ridiculous. They could have better spent the time, sorting out the areas within BS7671 that actually ''DO'' need sorting out!!