TNCS - Earthing connections

[mrjonwork0728]

Hi all, I am doing work atm in a block of flat were they have added on extra flats and I doing all the isolators and meter tails. The dno have supplied a 3 phase PME cutout. I am wondering in regards to the earthing connections if the dno will supply an earth bar or if it is up to myself to install this and also if there are any regulations as to what type of earth block/bar is required.

 

[Julie.]

Hi all, I am doing work atm in a block of flat were they have added on extra flats and I doing all the isolators and meter tails. The dno have supplied a 3 phase PME cutout. I am wondering in regards to the earthing connections if the dno will supply an earth bar or if it is up to myself to install this and also if there are any regulations as to what type of earth block/bar is required.

The requirements for a switchboard including earthing bar (MET) are detailed in ENA TS37-4.

However, who supplies this is within the agreement between the DNO and Customer.

It depends on the size of the installation, for smaller installations the DNO would just provide a cut-out, the metering the meter and after which you may split into sub meters etc. In this case it would generally be the end customer providing everything other than meter and cut out.

Again in the larger sizes the customer would generally provide a full switchboard, the DNO the cut out, and metering ALL the meters.

However in-between there are times when the DNO provides the board, splitting into many MPANS , other time the customer provides this board or functionality etc.

Most times, if you provide the board, you are responsible for the MET.

 

[Rockingit]

Has this become a BNO environment? In which case it will almost certainly fall to the owner not the DNO. You don't say what size the incomer is but a 400A earth bar with link isn't expensive (although they can be a pain to find space for!!)