This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

I`ve been thinking

OK the title might startle some who know me.

Ring Final rules.

What is the intention behind the rule "no more spurs than points on the ring".

I think most of us who have run rings would almost exclusively put every point on a ring and no spurs at all.

Spurs are then usually just additions.

One spur max per point.

One spur allowed at origin.

If I saw a ring with say 12 points on ring and one ring per point and say 1 point at origin that would be 12 on ring and 13 spurs that would not worry me.

In fact if I saw say 5 points at origin it would not worry me either.

If I saw 12 on ring each with one spur then 5 spurs at origin then 11 spurs on joints between points woul I worry?

No I would not although this "golden rule" would have been well and truly broken.

I think the rule intention was purely good housekeeping to keep us all on the straight and narrow.

In fact some on here have mentionded a ring in a loft with junction boxes dropped dow to spurs. Therefore all spurs and not on ring.

Note I did not pick the number of 12 points on ring for any reason, I could have picked 5 or 50 or 5000.
Parents
  • Yep agreed junction boxes have no place in a new install, however for additions/alterations are sometimes not easy avoided, any joints should be made in existing back boxes.

    Effectively in this instance the blanked box would become a junction box in its own right. However if it is plastered over then it must be established that the remaing and/or new additions provide zone indication for all buried cables less than 50mm deep (I do not like the 50mm limit at all personally). To do the job properly and avoid the blank solution then cables must be rerouted if any zone info will be lost
Reply
  • Yep agreed junction boxes have no place in a new install, however for additions/alterations are sometimes not easy avoided, any joints should be made in existing back boxes.

    Effectively in this instance the blanked box would become a junction box in its own right. However if it is plastered over then it must be established that the remaing and/or new additions provide zone indication for all buried cables less than 50mm deep (I do not like the 50mm limit at all personally). To do the job properly and avoid the blank solution then cables must be rerouted if any zone info will be lost
Children
No Data