Re:Old TV caused village broadband outages for 18 months
by hyperdimension on Tuesday September 22, 2020 @11:38AM
(#24555776)
I'm very intrigued--can I get any more details about how you could safely do that? Did you, e.g. disconnect the main breaker and have a spare Van de Graaff generator lying around?
Re:Old TV caused village broadband outages for 18 months
by rosswilson on Tuesday September 22, 2020 @12:13PM
(#24556265)
It's called Insulation Resistance Testing and an electrician would typically use a device like a Megger tester.
Here's a good video about it: https://www.youtube.com/watch?v=CsXUuuV4_sw
Re:Old TV caused village broadband outages for 18 months
by hyperdimension on Tuesday September 22, 2020 @02:57PM
(#24558432)
Oh, of course. I was not thinking right. I was imagining a 'chunky' HV supply rather than a hi-pot tester, like some Stanford Research PSU, but those only went up to a few kV if I'm remembering correctly. Thanks.
Re:Old TV caused village broadband outages for 18 months
by arnon on Tuesday September 22, 2020 @11:56AM
(#24556032)
I obviously had help :)
I had an electrician come and perform this step. The house was disconnected from the source, and then a "thumper" was used: https://megger.com/portable-fault-location-system-stx40- 2000
A few months ago, my house started having intermittent failures.
It turns out that some road works caused one of the phases in my house to leak into the other phase, which caused a whole array of problems, but only in specific areas of the house.
We discovered this by piping 40kV into the wiring and listening to crackling in the ground, where we found the faulty cabling.