Hi All, we have been asked to install tails from a new DNO 400A TPN cut-out to an existing panelboard. This new DNO supply appears to be TN-S (we are trying to source the quotation to confirm the DNO supply arrangement.) The building is of steel frame cons

Is it more likely to be 1No. PME and 1 No. TT?

Is it more likely to be 1No. PME and 1 No. TT?

Hi, The new supply appears to include a separate earth cable connected to the cut-out earth terminal. We are seeking clarification. Thank you.

I will rephrase that, should it be 1 No. PME and 1No. TT?

If the DNO supplies an earth terminal, it is your responsibility to determine if it should be used or not and make the final connection.