Maximum Zs for BS 88-3 100A main fuse and a TN-S supply…
Why on a TN-S earthing system is the maximum Ze given as 0.8 ohms by the supply authority when it’s often protected by a BS 88-3 100A fuse which has a maximum Zs of 0.38 ohms? This maximum value for Ze of 0.8 ohms for a TN-S earthing system is a value that is quoted … Read more