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.
Moved into property ... No fuses?
- Thread starter Tunstallwood
- Start date
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EXACTLY why you would need 10mm!
And if you leave it connected to your CU when you upgrade to PME, it is part of the installation and is extraneous. It would require 10mm bonding.
I would have expected a connector with three reds to be there as well. It's possible this and the earth wires are tucked up in the ceiling void.
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Can you have extraneous parts outside?
It's either connected (as is) and an earth rod or...
...disconnected and a piece of metal in the garden.
Best start bonding those metal fences.
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.
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.
It cannot possibly be an extraneous-conductive-part, because the definition of that requires it to not be part of the electrical installation.
An earth rod is part of the electrical installation.
An earth rod is 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.
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.
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