Hot tub - TN-C-S

[snipersmith87]

Im after some advice regarding the earthing of a 32Amp hottub. I've yet to install one and am dubious about the risks associated.
The supply is T-N-C-S.
My plan is to put a seperate supply direct from origin via henleys to a 50amp MCB. 10mm 3c SWA approx 25m to a small wooden workshop. Within the workshop I'm locating a seperate DB with 30mA RCBO to supply small power / lighting within and the 32Amp hot tub sited on patio.
6mm 3c swa to rotary isolator. At this point I'm going to lose the supply armour via stuffing gland and internal cpc via wago. I was then going to install an earth rod connected to the load swa cpc and armouring upto hottub.
Can anybody see any issues with my scenario or further advice?

 

[Jonspark]

Slightly different topic but worth checking out the Zappi EV charger as it has some built in protection that states “TN : can be connected to the PME supply. Complies with BS 7671:2018, 722.411.4.1 (iii)”

I wonder if Hot Tub Manufactures have or will adopt this technology?

Just took this from the Jacuzzi manual
“For the equipotential connection as required by specific na- tional standards, the installer must use the terminal provid- ed (standard EN 60335.2.60)in the electrical box ( 11), and marked with the symbol .
In particular, an equipotential condition must be established for all metallic masses surrounding the spa, for example water and gas pipes, metallic platforms, and so on.“

this would suggest the MET to me, thoughts?