Installing FCU for burglar alarm & additional sockets at same time?

[MrCow]

Hi Folks,

I am installing a burglar alarm. All the wiring/sensors etc will come back to the garage. The installation requires the alarm be powered via a 3A FCU. This in itself is not a problem, as I can run a spur from a downstairs socket (ring final, 2.5mm T+E, 32A MCB)

However I was wondering if I could install a single or double outlet at the same time, as there are no outlets in the garage and it would be handy to have one.
If I wanted to do this, how would I wire it? Is it correct that I'd need to run the FCU as a spur off the ring final socket, wire the alarm into the FCU, then run the new outlet from the same FCU? Also, I'm guessing the ocassional lawnmower or car vacuum I intend to use from the new sockets would overload the 3A fuse in the FCU that the burglar alarm requires - any issues with putting a 13A fuse in there instead if the new sockets are to be supplied by the FCU?

Thanks for any advice...

 

[flameport]

Extend the ring to the FCU and the new socket.

 

[MrCow]

Extend the ring to the FCU and the new socket.

Thanks, so just to be clear, i can't just fit a fused spur as in the attached diagram, I need to have the ring cct expanded and have the fcu directly on it?

 

[DetlefSchmitz]

You can. It's just what flameport suggested gives you more potential current and future options

 

[EFLImpudence]

Or you can, of course, use suitably sized cable for the current rating of the ring MCB.