I am looking at a job where the DNO supply is around 30 meters from the Consumer units. The SWA will be installed surface to the ground floor building up into the flats.
It is 3 separate flats, with 3 DNO supplies. I am thinking that best method would to be put sub-mains for each flat with 100amp isolator and install 25mm SWA to each CU, taking SWA at CU end into metal box then bringing cores into the CU.
I recently see a new build house where a 25mm SWA was not terminated at either end and just inside the enclosure and earthed from the banjo?
Is there a more cost effective method to this, it is a PME supply. 3 bed flat with normal accessories, electric cooker/hob (no power shower).
It is 3 separate flats, with 3 DNO supplies. I am thinking that best method would to be put sub-mains for each flat with 100amp isolator and install 25mm SWA to each CU, taking SWA at CU end into metal box then bringing cores into the CU.
I recently see a new build house where a 25mm SWA was not terminated at either end and just inside the enclosure and earthed from the banjo?
Is there a more cost effective method to this, it is a PME supply. 3 bed flat with normal accessories, electric cooker/hob (no power shower).