Hot tub electric shock

[LastManOnline]

But wouldn't this voltage go once the power is removed from the tub?

Correct. Once power is removed you should no longer feel any voltage. Is your rcd double or single pole?

 

[Samhhh]

Correct. Once power is removed you should no longer feel any voltage. Is your rcd double or single pole?

Double pole mate

 

[LastManOnline]

Double pole mate

Based on that then it can only be the supply earth that's causing the issue. I agree with your brother. Disconnect the supply earth and see if "tingle" disappears.That will confirm it.

 

[Samhhh]

Based on that then it can only be the supply earth that's causing the issue. I agree with your brother. Disconnect the supply earth and see if "tingle" disappears.That will confirm it.

I think for this one I will just stick with the multimeter results rather than doing the finger test ? thankyou for the help is much appreciated

 

[brianmoooore]

I would never install a hot tub on TNC-S. My own are on a genuine TNS system, and use the DNO earth, but if it were TNC-S, the tubs, and the buildings by them, would be TT.

 

[pc1966]

I would never install a hot tub on TNC-S. My own are on a genuine TNS system, and use the DNO earth, but if it were TNC-S, the tubs, and the buildings by them, would be TT.

More and more I am thinking all hot tubs should be on a TT supply, as even if your supply appears to be TN-S there is a chance that elsewhere repairs or cable replacement has essentially converted your supply to TN-C-S (just a rather long 'S' there).

 

[LastManOnline]

I would never install a hot tub on TNC-S. My own are on a genuine TNS system,

And now we come to the nub of the problem. An unsatisfactory supply system. TNS was and is the only proper supply system. Ironically I thought that a combination of outside metalwork like heat pumps, electric gates, electric vehicles etc would highlight the frailties of TNC-S. But I now wonder if it may be hot tubs that eventually highlight the issues!!

 

[brianmoooore]

By "genuine TNS" I mean that I can see all the earthing rods, and every inch of the supply cables, all the way from the 11kV - 230-0-230 Tx, to all three DNO service heads

 

[pc1966]

By "genuine TNS" I mean that I can see all the earthing rods, and every inch of the supply cables, all the way from the 11kV - 230-0-230 Tx, to all three DNO service heads

You are very lucky then!

 

[LastManOnline]

By "genuine TNS" I mean that I can see all the earthing rods, and every inch of the supply cables, all the way from the 11kV - 230-0-230 Tx, to all three DNO service heads

Then as pc1966 states you have truly a unique situation. Can I enquire about the earth rods? TNS is the one supply's system I have never worked on. What is the earth electrode arrangement?