Fused spur off ring main regulations

[Wilson12]

hello I've seen the page at the back of the regs book but nothing explains can you -
Have a spured socket off the ring using one cable and then put a fused spur after the spur and then feed additional sockets after the spir

 

[Octopus]

And the question is?

 

[Pete999]

hello I've seen the page at the back of the regs book but nothing explains can you -
Have a spured socket off the ring using one cable and then put a fused spur after the spur and then feed additional sockets after the spir

I take it Wilson that you are referring to Appendix 14 of BS7671, the diagram shows all scenarios for a RFC and indeed the requirements for installing spurs from the RFC.
Your question would be a no you can't spur a socket using a single cable, and then add a fused spur to supply more sockets. What you could do however is swap the Spurred socket for a fused spur and then add as many sockets as you like, what you are suggesting amounts to 2 spurs from the same point. Hope this helps.

 

[The Ghost]

Can you draw what you are asking. But it sounds like no, if I understand you correctly. Although saying that it hasn't stopped many others from doing so from what I see when attending various sites.
Aha manitas de plata has beat me to it.

 

[Taylortwocities]

There is nothing to stop you having two spurs from the socket on the ring.
One spur to the additional socket, one spur to the FCU/

There is a physical problem of cramming 4 x 2.5 conductors into the back of the socket.

If I was you, I would do as Pete says above

What you could do however is swap the Spurred socket for a fused spur and then add as many sockets as you like,

 

[Andy78]

hello I've seen the page at the back of the regs book but nothing explains can you -
Have a spured socket off the ring using one cable and then put a fused spur after the spur and then feed additional sockets after the spir

If I read correctly then no you can't do what you suggest. Think about the maximum potential load on the first section of cable spurred from the ring.

 

[Pete999]

There is nothing to stop you having two spurs from the socket on the ring.
One spur to the additional socket, one spur to the FCU/

There is a physical problem of cramming 4 x 2.5 conductors into the back of the socket.

If I was you, I would do as Pete says above

TTC I think the OP was wanting to spur off of a socket to another socket using a single 2.5, and then from that spurred socket to another fused spur to feed some more sockets

 

[Taylortwocities]

Ahh ok. Spur to FCU then on to additional sockets.

 

[Pete999]

Ahh ok. Spur to FCU then on to additional sockets.

Original socket to new spurred socket to FCU to feed more sockets. I'm getting a headache now. What you said above is how it should be done, now where are the headache pills?

 

[Andy78]

Ahh ok. Spur to FCU then on to additional sockets.

Like this I believe.

 

[Pete999]

Like this I believe.


View attachment 38765

Correcta munda, mon ami, zat is what I believe Monsewer OP meant.

 

[Taylortwocities]

Which he cannot do. as the FCU would be a spur from a spur.

The FCU must be before the first double socket.

 

[Taylortwocities]

COMME CA

 

[MisterE]

and you are never 39 and a quarter

 

[Andy78]

and you are never 39 and a quarter

You're right. I'm not quite up to the quarter. More like 39 1/8