B
brenfox
I was conducting a zs test on a 3 phase isolator and the terminals were sparking and snarling when i placed my probes onto them. This has never happened before and i am struggling to understand why it happened on this occasion. It was a 3 lead test: live,neutral, earth etc. It happened across all 3 phases but it gave me results of 0.85ish ohms which seemed correct.