Hot Tub

[DaveVector]

Fair enough. I think I should of thought it through a bit more before posting my question. So I will today I will decide on the discrimination aspect, which came about partly due to previous 'electrician' installing the two RCD's.

Could I therefore get back to the original question, please.
Do I need another earth spike as main house TT spike is so close to the outbuilding/hot tub?

 

[shanky887614]

Fair enough. I think I should of thought it through a bit more before posting my question. So I will today I will decide on the discrimination aspect, which came about partly due to previous 'electrician' installing the two RCD's.

Could I therefore get back to the original question, please.
Do I need another earth spike as main house TT spike is so close to the outbuilding/hot tub?

Pick one up from wholesalers and test at sub board if you dont need it take it back

 

[Engineer54]

Fair enough. I think I should of thought it through a bit more before posting my question. So I will today I will decide on the discrimination aspect, which came about partly due to previous 'electrician' installing the two RCD's.

Could I therefore get back to the original question, please.
Do I need another earth spike as main house TT spike is so close to the outbuilding/hot tub?

So what is the current Ra value that you are seeing with the existing earth rod?? If it's a completely Naff value and/or gained from one of those thin 3/8'' twigs, then it would be better to replace altogether. If it's a decent sized rod that still has a viable screw thread, then couple another rod on to it. Or you can drive in another 2 X 1.2M coupled rod making sure you are at least 3 metres or more distant from the existing rod. Depth is the key to a good TT system, for both lowering Ra values and just as important for ensuring the TT systems stability...

I think others have brought up the other incorrect factors of your OP and by the sound of it, you seem to be in the process addressing them...

 

[i=p/u]

Or getting dressed and ready to start , now you have the confidence ...