See picture below the Main Earthing Conductor is some kind of Fabric?
![[ElectriciansForums.net] Main Eearthing Conductor - Fabric ????](https://www.electriciansforums.net/attachments/mec-png.108611/ "[ElectriciansForums.net] Main Eearthing Conductor - Fabric ????")
- Thread starter Mark Wright
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Discuss Main Eearthing Conductor - Fabric ???? in the UK Electrical Forum area at ElectriciansForums.net
Fabric? Surely that's steel braid?
OP
Ok brilliant. Would the DNO replace this and would they charge?
It will be tin-plated copper braid. Quite common for earth bonding in certain systems.
Nothing wrong with it if it meets CSA for earth, and works very well with things like constant-force springs.
For example:
www.copperbraid.co.uk
Nothing wrong with it if it meets CSA for earth, and works very well with things like constant-force springs.
For example:
Flat Copper Braid – Copper Braid Products
www.copperbraid.co.uk
OP
Really looks like it should be upgraded?
What's the equivalent CSA size compared to a stranded copper conductor?
It’s normally the case that where you see this it is TNS earthing and when the PFC is measured the braid will sufficiently satisfy the adiabatic equation.
If it’s TNS there is no requirement of min 10 sq mm main bonds.
So while you won’t see this example in the On Site Guide it can usually be proved to be compliant.
If it’s TNS there is no requirement of min 10 sq mm main bonds.
So while you won’t see this example in the On Site Guide it can usually be proved to be compliant.
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