Ring or Spur?

[PaulP59D]

Hi,

I am just fitting a new shower, with a 2.5 bar pump behind it, to give the water a bit of extra push. The pump will either be situated in the loft or upstairs at the bottom of a large walk-in cupboard.

For ease of getting a cable to the new pump I was planning to just take a single cable from the fuse board and terminate it in a wall socket with an in-built 30 mA RCD. The pump has a plug top with an appropriately rated 5A fuse.

However, my wife has decided that she would like an extra wall socket in a nearby upstairs bedroom. The new pump cable will be conveniently near to where the socket will have to be situated.

The question is, can I just add the second socket in series, off the new pump socket - effectively a spur off a spur (fuse board to pump socket to new wall socket) - or should I turn these extra two sockets into a third ring main?

So, as I see it, it's either:

fuse board > pump socket > new wall socket

or

fuse board > pump socket > new wall socket > fuse board.

Any help with the regs here would be must appreciated.

Cheers

Paul

 

[sparkwright]

assuming you have a spare way in the fuse box you can do a simple radial;

16 or 20 A fuse/mcb > pump socket > wall socket

or
you could do a new ring though not much point really;

32 A fuse/mcb > pump socket > wall socket > 32 A fuse/mcb


if you do not have a spare way you could extend an existing ring circuit, ie run two cables from the fusebox. at the fuse box you would have to join an old cable to a new cable; and at the fuse/mcb join the other old cable to the other new cable. make sure it is a perfect ring.

 

[PaulP59D]

Thanks for such a quick reply, it's much appreciated.

So, is it the the spare MCB that makes the series-type (non-ring)connection legal?

 

[DCC]

So, is it the the spare MCB that makes the series-type (non-ring)connection legal?

Fusing the radial at 16 or 20A protects the radial and makes it allowed (regardless of how many outlets are on the radial). Its probably not "legal" for you to be doing any of this.

Edit: For 2.5mm cable that is.

 

[PaulP59D]

Thanks, again.

 

[sparkwright]

don't forget to thank DCC with the thanks button...

 

[ban-all-sheds]

Any help with the regs here would be must appreciated.

//www.diynot.com/wiki/electrics:part-p

 

[AndyPRK]

PMSL