Hot tubs....

[keniff]

So hot tubs, would you use the pme supply and get that slight tingle when getting out or rod it? Can't find a reg on it so it's a bit unclear. Your thoughts please!!

 

[Engineer54]

Hi E54,

As far as PME goes, I think this probably the time to consider TTing it, as you would for caravan pitches etc.

Edit: just read your post saying basically the same thing, lol

It's not so much the PME, more in the fact that a person with wet bare feet on bare ground or a conductive concrete, that is at or near to true ground potential, with an electrical ground potential also being present. There is a chance (remote maybe) of a step voltage between the two potentials....

The chances of a broken neutral on the PME, i wouldn't particularly consider, you'll be lucky to see one real instance in a lifetime...

 

[keniff]

Thanks for all the replies found a sticker on the tub to earth rod the install, 3 rods smacked in the ground later got it to 13ohms..... Dipped my hand in to check water temp and I got a tingle!!! Think i have narrowed it down to heater leaking to earth a little so I'm going to ir the element tomorrow and more importantly not use it for now lol

 

[Engineer54]

Sounds as if you have an American hot tub there, if you have found a sticker to that effect. American hot tubs often come with a supplied 8 foot earth rod when new...

 

[Guest55]

Sounds as if you have an American hot tub there, if you have found a sticker to that effect. American hot tubs often come with a supplied 8 foot earth rod when new...

You'll have fun banging in a 8 ft rod if ts in a single length lol.
Sledge-hammer on stepladders anyone ?

 

[D Skelton]

but not a 200 ohm TT...lol!!!

What about a 199 ohm TT?

 

[keniff]

Right to all of those interested I have tried the rod and pme and you get a tingle and now have made the tub TT and tingle has gone, rod is 13 ohms so all good to go! Must be a slight potential difference between true earth so to speak and the suppliers earth, that's all I can think of....

 

[keniff]

It's not so much the PME, more in the fact that a person with wet bare feet on bare ground or a conductive concrete, that is at or near to true ground potential, with an electrical ground potential also being present. There is a chance (remote maybe) of a step voltage between the two potentials....

The chances of a broken neutral on the PME, i wouldn't particularly consider, you'll be lucky to see one real instance in a lifetime...

That's what I was trying to say lol didnt realise you has already said it