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Thanks bernardgreen, I see the logic of this - much appreciated. This is definitely one for a spark, but I want to understand the issues for peace of mind. I take it the CPC of the SWA would only be earthed at the new consumer unit end, to avoid the export issue you explained? Would you put...

So a earth mat / rod near the hot tub (connecting to the tub, SWA armour and CPC, and no earth connection at the CU?

Indeed, water, electric and bare feet are what bother me. I have dealt with some dodgy contractors, so want to have a good idea how this should be done before I let someone loose on it (no offence to anyone on here ). I am glad I asked on here, as it now clear that my TN-S should be treated as a...

The cable is lead sheathed and wrapped in an oil tape with a metal clamp round the cable linked to the MET, but I take it you mean the high likelihood of parts of this SNE cable (between me and the transformer) inevitably having being replaced at some point with CNE? That sounds reasonable, so...

Thanks ericmark, but I don't have an EV charging point and I'll be sticking to petrol for as long as I can. Also, my earthing arrangement is TN-S not TN-C-S, so I don't think this concern applies?

Thanks again Sunray - much appreciated!

Hi Sunray, thanks for your reply - I read that thread and that makes sense, so I will gland straight into the CU. The cable will drop down from the CU, then needs to turn 90 degrees to pass though the wall, before going into the ground - would you recommend a junction box / IP box either side of...

Hi I want to install a 6mm SWA cable from the house CU to an external isolator to provide a 32amp supply. At the CU connection, do I need to first bring the cable into an insulated adaptable box, then run the core into the CU, or can I simply gland the SWA straight into the CU?