Spur off a CU?

Hi,

I have a downstairs cupboard which, as well as containing the consumer unit, is also becoming something of a "comm central" for electronic bits and pieces like a DECT base station, ADSL router, etc. I've got a new toy to add in there, and I can only see the number increasing, so I want to add some proper sockets instead of the current ad-hoc arrangement.

The obvious approach is to wire up the sockets (probably three doubles right next to each other) as a radial, and just connect it into the "downstairs ring" MCB. Logically this seems like a spur off the ring, but is it likely to raise any eyebrows?

The only other source of power in the cupboard is the FCU for the boiler. This would presumably be on the ring since there's no separate breaker for it, so I guess I could take a spur off here instead. But I don't know for sure how this is connected (could be a spur itself) so the CU option looks better. Of course, all the devices I intend to plug in here are low-power wall-wart ones, so most of this is probably moot in practice, but I realise that I can't rely on this since there's always the possibility of some idiot one day plugging a 3-bar fire into it.

Cheers,

Pete

Reply to
Pete Verdon
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Yes, as an unfused spur from a ring is only allowed to supply one double socket or one FCU. You could spur to the FCU and have your sockets on the load side of the FCU.

Owain

Reply to
Owain

Like that it would because an unfused spur from a ring should only feed one single or double socket, or one item of fixed equipment via an FCU. A fused spur will be fine for your application though - spur off from the origin of the ring in the consumer unit to a switched fused connection unit (with neon, if you wish) fitted with, say, a 5 A fuse. This can then feed as many sockets as you need, which you can label "for IT equipment only, load 5 A max." or similar. The switch on the FCU provides a convenient master isolator for all the equipment.

Don't spur from an existing spur, for the reason given above. There's no objection to two spurs being taken from the same point (including the origin) though, subject to wiring space and terminal capacity.

Reply to
Andy Wade

Good catch. I guess I was thinking of "big pile of sockets in one place" as one "item", but of course that's not right.

I like this idea. Thanks.

Pete

Reply to
Pete Verdon

Silly question - Why not wire them as a ring from the MCB rather than a radial?

Not sure if two rings from one MCB is 'permitted' - Anyone know? The cabling is still adequately protected...

Peter

Reply to
Peter Watson

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