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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
  • I agree the "no more spurs than points on the ring" rule was more about good practice than any electrical issue. Some of the original diagrams for rings seemed to be attempting to run a cable next to every wall you might ever want to have a socket on - even to the point of having a figure-8 arrangement with a 'bridge' cable along the interior wall between the front and back rooms (one ring for the whole house in those days) - the emphasis seemed to be on being able to have sockets anywhere (initially or as future additions) with the least overall cable used. Probably not surprising given the post war copper shortages.


      - Andy.
Reply
  • I agree the "no more spurs than points on the ring" rule was more about good practice than any electrical issue. Some of the original diagrams for rings seemed to be attempting to run a cable next to every wall you might ever want to have a socket on - even to the point of having a figure-8 arrangement with a 'bridge' cable along the interior wall between the front and back rooms (one ring for the whole house in those days) - the emphasis seemed to be on being able to have sockets anywhere (initially or as future additions) with the least overall cable used. Probably not surprising given the post war copper shortages.


      - Andy.
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