Nope neither of those 
Another strange fault...
- Thread starter RF Lighting
- Start date
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Metal waste on the floor drain? Not bonded? PD between this and the 'earthed' water.
Getting closer
Floor or floor drain somehow live (or raised potential) from a damaged cable, shock due to current flow from floor up to 'earthed' water?
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The singles on the drum is a reference point to true earth outside the property.
The floor is showing live at 185V to earth
It was caused by a damaged cable set into the tile adhesive supplying the bathroom vanity mirror
I thought the potential difference was between the water and the shower CPC
How come the RCD did not pick any of this up
How come the RCD did not pick any of this up
The water was becoming 'live' from the floor. Think of it as the electric travelling against the flow of water.
The water was showing about 90V to the shower CPC which was at earth potential. Had a reading been taken between the floor and the CPC the 185V would have shown.
The extenal earth was used to rule out all other possible variables, and was found that the nearer the floor you tested the water, the higher the voltage.
The lighting supply providing the stray live was not on RCD, so no tripping.
The water was showing about 90V to the shower CPC which was at earth potential. Had a reading been taken between the floor and the CPC the 185V would have shown.
The extenal earth was used to rule out all other possible variables, and was found that the nearer the floor you tested the water, the higher the voltage.
The lighting supply providing the stray live was not on RCD, so no tripping.
Well thanks for that, an interesting one, and one which really surprises me.
Different, but I recall myth busters doing a show about people peeing on the live rail of a railway, and seeing if it could kill them, the hard bit was getting a constant flow of water to conduct the electricity.
Different, but I recall myth busters doing a show about people peeing on the live rail of a railway, and seeing if it could kill them, the hard bit was getting a constant flow of water to conduct the electricity.
I was thinking damaged/not properly earthed UFH heating wire making the floor live. Right idea, wrong circuitIt was caused by a damaged cable set into the tile adhesive supplying the bathroom vanity mirror
Think I need some points
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