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2.5mm2 cable, clipped direct has a rating of 27A. The reason we can protect the cable with a 32A mcb is that there are 2 paths for current to flow in a ring. Correct?

JohnD did you manage to look this up?

No. It was an response to one of JohnD's suggestions.

No, but someone suggested this and I was not sure myself whether this was the best way to do it. It will be a concrete floor with underfloor heatingn so no under floor wiring. Will 2.5mm2 cable be sufficient when bunching the 2 cables in the conduit?

I will still need to go up and over the doors. The lounge, dinning room and kitchen are open plan and there are two sets of French doors to outside.

It is being built at the moment and is ready for the first fix.

I am proposing to use 2.5mm2 cable, run vertically to each back box in 20mm conduit ( both cable to and from socket in one conduit). Cable run will be clipped to joists. Insulation will lie behind conduit ie not surrounded. Does this all sound OK.

No he was not refering to bonding. He said as the cpc in the 10mm2 was only 4mm2 it would need to be added to for this application.

I was told that one would need to add another cpc to bring up the size of the cpc in the 10mm2 T/E cable for a 9.2kw shower. Why would this be necessary?

Thank you all for your help.

Yes, it is a switchfuse. Can I connect the gland to the MET?

Too late, already bought the SWA, but you are spot on it would have been easier. Can you direct me to the type of adaptable box I can use. Cheers

It is 16mm2 SWA.

What is the best way to achieve this? The SWA will be supplied via a 60A insulated isolator.

What is the reason for one end.

If the armour is not being used for earthing function does it still need any connection at all ie. earthed at one end?

Has anyone joined and had an on site assesment with NAPIT?

How high is "out of reach of children" or can that mean located in a cupboard thats lockable or utility room with door shut or what. I can't seem to find a reg that states this clearly.

nozspark wrote I added a second earth rod and the new reading is 73.7 ohm. Sorted.