[HELP] Electric Shock from Shower

[JordanFern]

Not sure where else to go (so please don't get mad), our family electrician has run out of ideas so turning to forums for any help.

Had a new central heating cylinder fitted which allowed me to have a new mains shower fitted (replaced an old electric shower).

Every time i touch the wall (provided its wet), or the body of the shower its self, i get a 'mild' electric shock. (See video, 57V)

So i immediately called the plumber (as it didn't do this before he replaced the shower) he had no clue... so the electrician came round and earthed everything he could find (see pictures below). Removed the old electrical shower power, and did a full sweep to ultimately become stuck.

What do i do? No one seems to know the answer and I'm stuck here getting shocked every morning i shower...

[video=youtube_share;cGQgyhz9RWw]https://youtu.be/cGQgyhz9RWw[/video]

[video=youtube_share;cJSLpt63_mg]https://youtu.be/cJSLpt63_mg[/video]

[video=youtube_share;ANIRS0HTjio]https://youtu.be/ANIRS0HTjio[/video]

[video=youtube_share;uuhMQOjtIkc]https://youtu.be/uuhMQOjtIkc[/video]

 

[Resu]

locate the fused connection unit (fused spur) feeding the shower pump, switch it off and remove the fuse

Edit: he didn't say if the pump mentioned was for the shower or was part of the heating system.

 

[telectrix]

ah. thought it was a power shower with pumped feed.

 

[JordanFern]

The pump is part of the heating system, its an unvented cylinder off the water mains.

Not sure what else i could isolate without turning the entire heating off

Safer (and easier) just not to use the shower.

Will report back tomorrow

 

[HandySparks]

If you want to try a bit of investigation yourself, turn off each circuit breaker one at a time and see if it makes any difference to the voltages you're measuring.

The fault may be nothing to do with the pump. It could be cable damage to an unrelated circuit.

 

[Leesparkykent]

TJ Anderson is a member of the forum, from Derby and knows his stuff..could be worth sending him a PM.

http://www.electriciansforums.co.uk/members/85632.html

 

[JordanFern]

Yep, Electrictian has ran out of ideas, time to speak to TJ Anderson

 

[ses]

Is this a house or flat?
I had one and the shower tray was leaking onto the lighting circuit of flat below

 

[JordanFern]

Its a house, i have messaged TJ but no response, doesn't look like he has been online for a few weeks

 

[Resu]

This probably won't put your mind at ease but we came across a similar issue a few years ago. Around 50v off the shower trap/mixer valve etc. Turned out fault was in a void property a few doors up and due to a supply issue it was interfering with our client's earth.

 

[Midwest]

Interesting problem, if not deadly. OP; you mention an RCD, did that 'trip' when you received your shock, and in the last vid, is your meter showing 234v? Have you got hold of an electrician yet?

 

[JordanFern]

No it's reporting 57v max
still can't get ahold of an Electrictian

 

[Midwest]

Did the RCD trip? What supply have you?

 

[JordanFern]

No the RCD hasn't tripped
Not sure what you mean by supply? Isn't everything 240V?

 

[Midwest]

The 3rd vid has a reading of 234 something, wasn't sure if that was 234v, 2.34v or 23.4v? Sorry the type of supply, perhaps you could provide a pic of your meter & main fuse with supply cable. It could be, that the electric shock you received is from the shower tiled wall via you, and then the metal shower hose to copper pipe, if you see what I mean. This may well be were a cable has become mechanically damaged. This could of happened in you refurbishment, or could of happened some time ago, and perhaps the new pipework has been better earthed, although I think you said you had an electric shower.

 

[Kamikaze]

Time to track this problem down systematically! Post No 19 is your next logical step. This will at least indicate which circuit the voltage is coming from. Also check if you got any earth continuity from the shower head back to the origin?


Edit: just spotted something in the videos. I’m willing to wager there is no earth continuity between the shower head and the origin.