How many straight connections are allowed in a ring main ?
There's all sorts of things which he could have meant, and I think what we need is clarification, rather than speculation.I think he means spurring of the ring main ?
Indeed, and I believe there is no reg saying you cannot have more. Four is quite common.You are permitted three cables into the socket,
Indeed, although four is probably the practical limit - and, even then, it is only some makes (like MK) that can fairly easily be persuaded to accommodate four 2.5mm² conductors.Indeed, and I believe there is no reg saying you cannot have more. Four is quite common.
As I wrote, that's what I thought you meant. As I also said, to make such a join is acceptable (there must be many millions of such joins in UK electrical installations), provided it is done in a satisfactory manner.Thanks for replies, I simply mean to join two cables together with a suitable joint box where the cable is too short for whatever reason.
But nothing saying you can either. So like many things in UK wiring it's down to the professional judgement of the installer.Indeed, and I believe there is no reg saying you cannot have more.
I presume that you mean BS1363-2 - in which case, yes, it says :IIRC BS7671 requires sockets to take up to 3x2.5mm² or 2x4mm².
11.5 Line and neutral terminals in fixed socket-outlets shall permit the connection, without special preparation, of one, two or three 2.5 mm2 solid or stranded or of one or two 4 mm2 stranded conductors.
Indeed.Some manufacturers rate their sockets for more, for example MK rate their "logic plus" (and presumably other "plus" ranges) for 3x2.5mm² 3x4mm² or 2x6mm².
We often debated that question here, and most people seem to suspect the former - i.e. they 'simply neglected to consider it', perhaps because 'they' were not practising electricians who would be aware that there might sometimes be situations in which one would want more than three conductors in a terminal.Which leads to the question of why they don't rate them for 4x2.5mm²? Did they simply neglect to consider it? Are they worried that with four conductors in the terminal the termination reliability could be affected?
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