UK Static/Tingle from shower/towel rad.

[Dunc88]

Hi, working in a property a couple of years old. Earthing System is a TN-C-S.
Customer’s daughter/wife have both complained about receiving a “slight tingle/static sensation” when using the shower in only one of the bathrooms (when touching the shower/or towel rad). I’ve checked the incoming water main & its plastic, so there’s no 10mm water bond. All circuits are protected by 30mA rcbo’s, nothing has tripped to date. Ive only taken a quick look (an hour on the way home yesterday) so running the shower (fed directly from boiler) & turning the rads on whilst checking it with my volt stick is as far as i’ve got, didnt feel anything myself but want to go back again today to have another look. Any advice appreciated.

 

[Dunc88]

I've fault-found a problem many years ago where there was tingling in a shower. After numerous visits and probably around 14 site hours investigating it turned out to be the drain which was broken under ground outside and a leaking garden light connection box next to it. When the outside lights switched on every evening the drain on the floor of the shower itself was elevating in voltage sufficiently to give someone a nasty tingle when they touched the taps.

Thats crazy isnt it! Makes you doubt yourself when u cant find something but when theres so many potential outcomes its always going to be tough I spose! Thanks for the reply!

 

[Dabbers]

There isnt any, both enter the property in plastic

Gas should be in copper as well as oil.....