ring circuit for a submain?

[vde-electrician]

trying to find answers in the reg book, but is there anything to say you can't install say a larger ring circuit for a sub main? to reduce volt drop / cable size etc.

Normally you would obviously install a large enough cable, but would this be acceptable , whats our thoughts?

 

[Leesparkykent]

trying to find answers in the reg book, but is there anything to say you can't install say a larger ring circuit for a sub main? to reduce volt drop / cable size etc.

Normally you would obviously install a large enough cable, but would this be acceptable , whats our thoughts?

Surely it would then be a parallel circuit/parallel conductors .....There are requirments for installing/designing a parallel circuit/conductors.

A brief guide to the use of parallel conductors - https://www.voltimum.co.uk/articles/brief-guide-use-parallel-conductors

 

[buzzlightyear]

Sub feed only not a ring main .
Vd comes to mind has well .

 

[KEV 1 N]

Yes, seen plenty sub-mains cables ran in parallel. Ie it’s eaiser to install / terminate 2 x 150mm SWAs, than one big beast of 300mm2!
Only ring circuit (for sub-main) I’ve seen was in a prison, a 4 or 6mm2 ring circuit in trunking, ran round a number of cells, each had a small DB (fitted out side above the door) for the light and socket.

 

[Nigel]

Otherwise known as a parrellel feeder. Perfectly acceptable and common with larger supplies over large distances.

 

[DefyG]

We had a 11kV 'ring' around a factory site.

 

[ChrisElectrical88]

Yes but one point of your 11kV ring is left open.

 

[DefyG]

I understood it to be a complete ring! but wasn't something I was involved with at the time.

 

[ChrisElectrical88]

It will be a full ring main used as 2 radials back at the substation. The ring main is in for maintenance so work can be carried out on substations without having to turn half the site off. Clever concept.