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Which is best, long ring final with 2 spurs or short ring final with more spurs?

Former Community Member
Former Community Member
Good afternoon, hope you are all well. I have been re-evaluating the number and position of sockets in my bungalow, and considering having a few more added for convenience. Currently I seem to have a relatively short ring with 2 long spurs. If I measure the new route for cables incorporating the existing spurs and new sockets, I anticipate a total cable run of about 100m. From what I gather on this forum this is the limit for a ring final per 100m square of floor. Question is, is this a good idea, or should the ring final be made to run a shorter route and add more spurs, not exceeding the number of sockets on the ring, in order to keep volt drop to within acceptable limits. Not being an electrician I have used online cable size calculators to see if my idea is anywhere close to being ok and they come back with a huge 25mm squared cable. I am clearly out of my depth here hence the question. As always, many thanks in advance. Kind regards, Simon   
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    It is generally accepted that a ring final should not serve an area greater than 100 square meters. This should be applied with common sense and is not an absolute requirement.

    I am not convinced that a corridor 2.1 meters wide and 50 meters long needs two ring finals !

    OTOH, I consider it good practice to install a dedicated ring final for a kitchen in all but the smallest flats, even if the floor area of the ground floor is under the 100 square meters.


    It is a useful rule of thumb, that the length of cable for a standard ring final should not exceed about 100 meters. This again is not an absolute rule, but more than 100 meters of cable requires careful consideration, and may need larger cable.
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    It is generally accepted that a ring final should not serve an area greater than 100 square meters. This should be applied with common sense and is not an absolute requirement.

    I am not convinced that a corridor 2.1 meters wide and 50 meters long needs two ring finals !

    OTOH, I consider it good practice to install a dedicated ring final for a kitchen in all but the smallest flats, even if the floor area of the ground floor is under the 100 square meters.


    It is a useful rule of thumb, that the length of cable for a standard ring final should not exceed about 100 meters. This again is not an absolute rule, but more than 100 meters of cable requires careful consideration, and may need larger cable.
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