new development

[sprks]

Sorry if this is the wrong thread, but new to the site.

we are doing a new development consisting of two detached dwellings and a landlords.

we have just been informed the meters for all three are located at the start of the private drive, 70m away, some one has already installed a 5c 70mm swa cable from the meter position to another box located 15m from the houses, here we are expected to joint the cable to feed the 2 houses and install a landlords consumer unit.
i dont think this is correct, does anybody else have a take on this?

Thanks

 

[babylonsBurning]

Is it a single or three phase supply ?

 

[sprks]

Is it a single or three phase supply ?

at the meters there is a 3phase head that is then tailed to each single phase meter.

 

[Richard Burns]

The 70m run should be protected by fusing, if it was installed by the DNO then that is their problem and you can start your protection from the 15m position. If the cable was installed by A N Other then you need to correct this, but messing with meter tails is not approved.
So long as your loop impedance is OK at the houses then you should be OK. make sure your paperwork specifically excludes installing the 70m run.

 

[KAS1]

On the new development has the building company employed an electrical design engineer or are you responsible for the electrical design?

 

[babylonsBurning]

Hey spks, not sure how its going to work on a 5 core now that you have 3 separate single phase supplies. looks like some mixup with the installation of the SWA.

 

[Engineer54]

Hey spks, not sure how its going to work on a 5 core now that you have 3 separate single phase supplies. looks like some mixup with the installation of the SWA.

Why's that then??

 

[babylonsBurning]

Not sure if im understanding correctly, but im assuming at the meter position the dno has installed 3
separate single phase meters. From here I would guess that the neutrals for the supplies would be separate .
.

 

[Engineer54]

Yep they would. Not too dissimilar as to how, say a block of flats would be supplied from a 3 phase service cut-out.

It'll be interesting to know what the earthing system is, at the 70 m distant service cu-out??