Our system is on TN-S earthing and the connection with the supplier's cable from our earthing block is via what looks like a very small green wire not bigger than 2 or 3mm.
I've seen a sketch on the iet forum and this shows a 16mm cable.
Can we request that the DNO upgrade this or can they leave it as it is?
All the Z values tested ok as told by a spark.
I've seen a sketch on the iet forum and this shows a 16mm cable.
Can we request that the DNO upgrade this or can they leave it as it is?
All the Z values tested ok as told by a spark.