I think the 16mm tails is more if they are already in situ and replacing them would be awkward and costly to the client when it doesn’t need to be and don’t need replacement ie meter tails 15 meters away and installed within the fabric of the building.
Nothing wrong with 16mm tails clipped direct on a 80 amp fuse.
Nothing wrong with 16mm tails on a 100amp fuse if they’ve been there for years without suffering thermal damage and the loading of the installation does not exceed the ccc and they have adequate fault protection.
“Earthing lead” is that an official DNO term is it?
You are quite right tho, despite table 54.8 the local DNO should confirm their minimum requirements for the csa of the bonding conductors for TNCS arrangements , shame that they are never forthcoming.
You’d better check that you don’t need a 10Ka device as the easy 9 are 6 Ka rcbos, not even sure that they fit or should be fitted to the multi9 range, I’d ask Schneider.
By making the earthing for the EV it’s ownTT island, How will a broken PEN cause an issue when your earthing for the EV is not connected to the PME earthing?
No, the electrode you speak of is to supplement the existing earthing arrangement to migrate the effects of hand to foot touch voltage due to a broken PEN.
The EV earthing can still be separated and installed on its own TT island.
If it had it’s foundations buried in good contact with true earth , then yes id agree.
A metallic service pipe is buried directly into the ground and enters an electrical installation.
There is also no accessible exposed conductive parts in the cabin.
So you are saying that a metal enclosure on a metal clad socket is not an exposed conductive part??
Why would a wall be part of the electrical installation?
How can a steel box forming the enclosure of the spur be an extraneous conductive part by definition,when it forms part of the electrical installation? Is it not an exposed conductive part rather than an extraneous conductive part ?
I’m not sure that RCD spurs are compliant as they are not included in bs7671 and bs 7288 state that they only provide supplementary protection and that additional protection is assumed upstream.
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