FTTP coax filter suddenly live 110v AC....tingly!!!

[Northernboater]

So, I have FTTP, hub3.0

Usual filter between the wall plate and the router(modem in my case!).  Got bit of a zap from it today whilst moving some stuff around. 

Multimeter shows the filter body as 110v to earth. 

Tested the outside of the F connector at the power supply that feeds the wall plate, also 110v to earth, also giving mild shocks. 

I've tested all my other kit, all fine. How do I get a new power supply without 17 hours of explaining it via virgin media chat?

[Cardiffman282]

Maybe report it to Trading Standards https://www.citizensadvice.org.uk/consumer/get-more-help/report-to-trading-standards/ 

[Client62]

It is not uncommon for SMPS have some level of high impedance a/c mains leak.

[Northernboater]

Yeah,I think this one has just become a tad too leaky! 

I guess usually you would never feel it, unless you happened to be also holding onto something earthed. I've got other smps here that show between 50 and 80vac to earth, but those have no tingle to earth what so ever, even with a wet finger!

[jpeg1]

There is officially no longer such a thing as an earth wire. It's a protective conductor on a PME - Protective Multiple Earth. 

The old days of 'earthing' everything to the copper water pipe are over, now that mains water pipes are plastic. 

[Northernboater]

On a new build maybe. My supply is TN-S, so no PME as such, mine will be PEN- protective earth neutral, aka earth.....

But certainly where either the mains water or gas, or any other service, comes out of the ground and Into your house using a conductor, then equipotential bonding is still needed..... My gas pipe is copper to the meter, and copper into the house, and my mains water is copper to the first valve, hence needs bonding, and it was also build when supplementary bonding was required!

[jpeg1]

There's quite a variety of 'earthing' arrangements, according to the age of the building and when it was last rewired.  And the IEE wiring regs are frequently updated too.