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HOT TUBS ANY VIEWS OR ISSUES?

John Peckham
I have been chatting to a mate of mine who is a very experienced sparks who does 10-15 hot tub installs a year. He TTs his supplies to hot tubs which are on PME supplies which is the majority of supplies in Essex other than the odd TT supply in country areas.


He does get called back to hot tubs that he has not carried out electrical installations because people climbing in and out of the hot tub where people have experienced "tingles" ie minor electric shocks. Sure enough these shocks are due to the hot tub being directly connected to the PME earth.


Currently (excuse the pun) BS 7671 701 and 702 do not cover hot tubs only the general rules in Parts 1-6.


Does anyone on the forum carry out hot tub installations and if so how do you do it? Has anyone been called to investigate "tingles"? Does anyone know of any more serious shocks or injuries relating to hot tubs or any other equipment connected to a a PME supply?


Thanks in anticipation.


JP


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  • 0
    Just make sure your TT electrode is at least 2-3m away from any underground metallic pipe work connected to the PME earth.

    Wouldn't equipotentiality be better served by having the TT electrode at the same potential as the ground the tub was stood on ... whatever that might be.


    It seems a bit counterproductive to have the c.p.c. at a nice true earth potential if people are standing on ground that's at a higher potential due to a PME connected pipe below.


       - Andy.
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  • 0
    Just make sure your TT electrode is at least 2-3m away from any underground metallic pipe work connected to the PME earth.

    Wouldn't equipotentiality be better served by having the TT electrode at the same potential as the ground the tub was stood on ... whatever that might be.


    It seems a bit counterproductive to have the c.p.c. at a nice true earth potential if people are standing on ground that's at a higher potential due to a PME connected pipe below.


       - Andy.
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