How should you locally isolate the supply in a garage

[Superstrap]

I’ve just moved into a new bungalow.
The 6mm T&E cable supplying the garage goes to a FSU with a 13amp fuse.
The FSU feeds two double sockets and 2 LED light battens in the garage.
The supply is protected by a 16amp mcb backed up by a 63amp 30mA RCD from the consumer unit which is located in a cupboard in the bungalow.
I was wondering if a metal 2 way consumer unit with a 16mcb for the sockets and a 6amp mcb for the lighting should have been used instead of the FSU.
I would appreciate any advice on this subject thank you.
Steve

 

[brianmoooore]

16A MCB protecting the circuit at source, so it's OK as it is. If the MCB at source was 32A or 40A (voltage drop, etc permitting), then a local CU in the garage would be preferable.

 

[Spoon]

Welcome to the forum mate.

Your title and post ask different questions.

As your title asks, you can isolate the supply to your garage using the breaker or the FCU.

As for your post, apparently its a common way for new builds to have their garage wired up, as it's cheaper to install than have a CU in the garage.
Ok, 6mm is a bit overkill for a 16A supply, (as above, depending in installation method and voltage drop)
Adding a CU to your garage now would fall under the building regs and building control would need to be notified.

 

[pc1966]

Having a FCU is not that bad, only reason really to change would be if you expected to need more than 13A from the various sockets.

It is more common to see a garage wired as a 20A radial to the sockets and a FCU simply providing a switched 3A feed to the lights.

Having a means of isolation is a good thing, but if it were me planning this I would probably have put a 20A DP switch in the house so any garage fault (including the feed cable) could be isolated and not risk the house RCD tripping on the likes of an external N-E fault.