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Apparent voltage on plastic service head

Tolly

What are your thoughts on this please?

Using the TIS810 contact volt stick, you can see (no audio) that no voltage is indicated on the isolator, tails or meter, but there is (by flashing red and vibrating) on the plastic service head/fuse - the tester is supposed to activate at 50-600v. The relevant DNO came and tested it, and stated there's no more than 0.4v on the head (though I don't know about the tester they used). 

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  • 0

    A video showing how DNO operatives should use single pole contact voltage indicators as an aid for identifying issues, when carrying out safe isolation, PSCC, and Ze testing.

    youtu.be/z7han_twcnw

  • 0 in reply to Sparkingchip

    I see that at ~3:24 he proves live incomer with a test lamp first ;-)

    The problem that Father in Law had was that there was coupling between a true live and his isolated circuit (not sure what voltage he was working on) and that it was still capable of lighting a neon tester that was in use at the time. He needed the test lamp to show that there was no live power (this will have been before RCD leakage/shock protection being common).

    It's still a useful video though.

  • 0 in reply to Philip Oakley
    Philip Oakley said:
    I see that at ~3:24 he proves live incomer with a test lamp first ;-)

    A two pole tester shows there is a voltage difference between the probes, but not which probe actually has the highest voltage on it, it could be either of them.

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