Electrician Jobs TT supply for hot tub

[gcwarr]

Thanks for the advice so far. I now have a local qualified electrician engaged with this and an installation plan for TT earth at the hot tub and suitable cascaded RCD protection with selectivity at the supply end.

To TT at the Hot Tub end, yes, I have done so myself and is often easier. Just ensure you have complete isolation between the two earthing systems at this point of separation (perhaps at the isolator) and any other sources. 'Insulation' tape is not considered a suitable insulation - despite the name it adopts.

Out of interest, how would you usually achieve complete isolation of the two earthing systems at the isolator? In this case would the only incoming earth from the supply be via the armour of the SWA?