Ring Main Advice

[hoppy]

Hi, been reading a lot about ring mains lately and think i have been installing them incorrectly.

The firm i work for, we always take one leg to one end of the circuit, i.e the nearest point and the other leg to the furthest point and loop between, so we always end up with a short leg and very long leg.

As we commercial do installs the long leg is extremely long most of the time.

So obviously there is a loading issue.


What do you guys think is the best way to install a ring main, is the leap frog method best where you take one leg to the first point and one leg to the second point, then from the first point to the third point and so on.


but the problem i see with this is if you want to add a socket to the ring the you have re wire it slightly as the links miss a socket, i.e leep forg.


So what does everyone do when wiring ring mains?

Thanks guys all advice appreciated!!

Craig

 

[johnboy6083]

staggered rings are better for corridor installs, and also where the cable has to change type, ie singles in trunking, and then SWA and back to trunking.

the thing wth normal ring final circuits, is that you will always have one point that is more loaded than the rest of them, due to the use of the building. So in my mind there isnt any preference to either unless you know where the loads are more likely to be. Most rings are underloaded anyway.