We don't want any changes made there are plenty of sockets and the lighting positioning is good, it's what we have to have done that's the problem in terms of safety and inconvenience. Will proceed with the PIR and wait for the solicitor to get back to us.
It is just another of the protective Multiple earths on the PME system. Very useful as a back up if the neutral breaks somewhere in the network and the MET is no longer an "earth" at ground potential.
Extraneous-conductive-part: A conductive part liable to introduce a potential, generally Earth potential, and not forming part of the electrical installation.
Extraneous-conductive-part: A conductive part liable to introduce a potential, generally Earth potential, and not forming part of the electrical installation.
Extraneous-conductive-part: A conductive part liable to introduce a potential, generally Earth potential, and not forming part of the electrical installation.
A piece of rod in the ground with a copper cable coming into the building? How earthy do you want it to be before it's extraneous?
This was in an article some while ago when discussing earthing requirements.
We bond using 10mm taking into account possible fault currents and network circulating currents. How is a rod connected to your CU any different? If anything it will have a much lower impedance than the water and gas pipes you bond (these days). It can be expected to carry the same sort of currents when connected to a PME system.
It should be treated as an extraneous conductive part - it DOES come into the building by virtue of it's conductor.
If you change to PME, cut the cable off and leave the rod in the ground - it is then no longer an extraneous conductive part and is just the same as your metal fence, tent peg or car. If you leave it connected, and have the cable coming into the house and connected to your CU, IT IS extraneous.
Extraneous-conductive-part: A conductive part liable to introduce a potential, generally Earth potential, and not forming part of the electrical installation.
It is still going to be expected to carry fault current as your PBC would be - Why do we do these in 10mm?
You may also want to consider: "Where a number of installations have separate earthing arrangements, any protective conductors common to any of these installations shall either be capable of carrying the maximum fault current likely to flow through them or be earthed within one installation only and insulated from the earthing arrangements of any other
installation."
Definitions aside, you should not leave a rod connected to a PME upgrade unless you also increase the cable size. The article quite clearly stated that you should treat it as an extraneous conductive part.
Extraneous-conductive-part: A conductive part liable to introduce a potential, generally Earth potential, and not forming part of the electrical installation.
If you need to find a tradesperson to get your job done, please try our local search below,
or if you are doing it yourself you can find suppliers local to you.
Select the supplier or trade you require, enter your location to begin your search.
Please select a service and enter a location to continue...
Are you a trade or supplier? You can create your listing free at DIYnot Local