Earth Rod install

[Buzz1980]

Hi all
Having to install a earth rod In for a hot tub, hot tub just installed outside the house. I am planning on installing earth rod 100mm from edge of house what are the chances that there will be services below this line. The gas pipe and water pipe are further along the wall about 2M away I wouldn’t think the pipes will be running right along side the house would they ?

 

[pirate]

By coincidence, I was watching John Ward's video on this the other day, and it made for interesting watching,

 

[Buzz1980]

That has totally thrown me that video now. Had some info stating that hot tub cannot be connected to a IT or TNC earthing arrangement but I don’t know if that means you are able to connect to a TNCS earthing arrangement as I know TNC and TNCS are slightly different. Or do I use the TNCS system then drive a rod in and combined them. ?

 

[telectrix]

alternative..... rip out old bathroom ffxtures. install a large jacuzzi bath, forget hot tub.

benefits.....
1, cheaper to run when heating with gas.
2. no dangers electrical wise.
3. no pigeon shyte on your bald patch.

 

[pc1966]

Going TT with a double pole RCD or RCBO is the simplest solution.

Make sure the TT rod is close to the tub, then what matters for voltage difference (tub CPC to nearby soil) is going to be fine irrespective of other buried conductors. As you are looking at a 30mA RCD the rod only needs to meet 200 ohm or less so should be easy enough.

Just check for buried services one way or another!

 

[stevethesparks]

Agree with PC1966, DP RCD/rcbo should be the default.

 

[Buzz1980]

Thanks for all replies much appreciated.

have spoke with the hot tub supplier and they have stated that they are plug and play. They either put a 13amp plug top on it at one setting or 16amp plug top on it and change the setting. Said that they don’t TT the system just plug straight in, as it was used for hiring. Is this enough info to go by as looking up threads some say plug and play still have to be TTd ?

 

[marcuswareham]

Thanks for all replies much appreciated.

have spoke with the hot tub supplier and they have stated that they are plug and play. They either put a 13amp plug top on it at one setting or 16amp plug top on it and change the setting. Said that they don’t TT the system just plug straight in, as it was used for hiring. Is this enough info to go by as looking up threads some say plug and play still have to be TTd ?

Alot of people would say a plug and play would not be TTd
and it would be unrealistic for a hot tube hire company to require a TT supply for it,


If it were my hot tub (and i got it second hand so no warranty to void) I would have a little look inside and see how the heating element is assembled and what construction the pumps are. I would image most use plastic pumps and i have seen some tear down videos online of the lazy spa hot tubs it seems some models have class 1 heating elements and other models have an insulating jacket between the water and the element. If all of the exsposed parts are double insulated and the water is insulated from the CPC then there is no risk from PEN faults (class 2)

This might not be possible if it is not your hot tub, I was just saying that what I would do if was mine.

Best bet is to contact the hot tub manufacturers they will hopfully be able to tell you