SWA for shed **PME** EARTH?????????????

[Engineer54]

Cant you just do a loop test when everything is up and running and all extraneous metal earthed by 10mm back to the met in the dwelling

Already been stated by the O/P that there is No extraneous metalwork/services within the shed...
Therefore no requirement for any 10mm bonding conductors on this installation!!
But i would personally still install a 3 core cable as a CPC, and still use the earthed armouring too....lol!!

 

[Chr!s]

Im with E54 on this one.

If the spa is housed and an equipotential zone is created, then it no different to a hot tub in the house.So i would install it to "Section 701" .

If the hot tub is not housed and an equipotental zone can not be created then i would install to "Section 702". As for PME, i would either TT the installation at the supply end of the Distribution Circuit, or place an Electrode at the "MET" with a predetermined Ra which would limit the touch voltage on a broken pen and also reduce the possible sensation of an electric shock through the difference in the two "Earth Potentials".

Chris