Quote:
Originally Posted by The Philpott
'All the internal components potted in clear resin'
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That's pretty much what an Approved Seaward KD1E HV tester consists of: chain of potted resistors and a neon visible through a window. Except the Seaward tester has to be earthed.
A long time ago I once saw that our DNO (NORWEB back then) used a neon HV tester on V/T circuit spouts that DIDN'T need to be earthed.