Hello all.
I am posting with the hope of understanding what is going on with this DNO cutout ( apologies in advance if I ramble a bit). I have just moved into a flat which I am renovating. I have a reasonable understanding of electrics after the electricity meter but do not know much about what happens before it. I will say in advance that I do not intend to mess about with anything related to the DNO, rather I want to understand what is happening and also be a bit more knowledgeable when speaking with the UK power networks.
So here is the setup:
There is a single supply that ultimately supplies 4 different Victoria Flats in a looped supply.
I need to upgrade to 100A which I suspect is not possible with the current setup and the supplies may need to be un-looped. I went to have a look in the flat with the main incoming supply and was a bit confused about how it was wired between the different properties.
I have attached a picture for reference. There are three connections leaving this cutout . One to the persons meter, where the cutout is installed. One to the upstairs flat. and one that goes into the wall to supply the two neighboring flats .
I was looking at the cutout and can see that all the neutrals are connected together on the right hand side.but it appears that only one live is actually going through the Henley Block fuse ( Is this correct ?). The other two lives appear to come out of the left side of the block which make me think they are not fused at all in this location. (i do not know how these cutouts are wired inside so i could be wrong.)
Should i be concerned about this setup? My worry was that this setup relies on all the secondary fuses in all the flats remaining being correctly sized as to not overload the main cable. So if one of the flats upgraded to a larger fuse the overall system would have no way of regulating over current.
The person who the main incoming supply did however say that on occasion the whole supply has tripped which would indicate more a shared fuse but i not entirely sure i understood him correctly.
Any clarification on how this system works would be much appreciated and thanks for your time.
Regards
Nick
I am posting with the hope of understanding what is going on with this DNO cutout ( apologies in advance if I ramble a bit). I have just moved into a flat which I am renovating. I have a reasonable understanding of electrics after the electricity meter but do not know much about what happens before it. I will say in advance that I do not intend to mess about with anything related to the DNO, rather I want to understand what is happening and also be a bit more knowledgeable when speaking with the UK power networks.
So here is the setup:
There is a single supply that ultimately supplies 4 different Victoria Flats in a looped supply.
I need to upgrade to 100A which I suspect is not possible with the current setup and the supplies may need to be un-looped. I went to have a look in the flat with the main incoming supply and was a bit confused about how it was wired between the different properties.
I have attached a picture for reference. There are three connections leaving this cutout . One to the persons meter, where the cutout is installed. One to the upstairs flat. and one that goes into the wall to supply the two neighboring flats .
I was looking at the cutout and can see that all the neutrals are connected together on the right hand side.but it appears that only one live is actually going through the Henley Block fuse ( Is this correct ?). The other two lives appear to come out of the left side of the block which make me think they are not fused at all in this location. (i do not know how these cutouts are wired inside so i could be wrong.)
Should i be concerned about this setup? My worry was that this setup relies on all the secondary fuses in all the flats remaining being correctly sized as to not overload the main cable. So if one of the flats upgraded to a larger fuse the overall system would have no way of regulating over current.
The person who the main incoming supply did however say that on occasion the whole supply has tripped which would indicate more a shared fuse but i not entirely sure i understood him correctly.
Any clarification on how this system works would be much appreciated and thanks for your time.
Regards
Nick