Odd switch above fuse box

[jeffwestrop]

I moved into my house 6 years ago and have not really looked at the electrics in the garage until today when I had a problem.

The main consumer unit in the house feeds a four way fuse box with an isolator in the garage.

One of the 5A fuses in the garage fuse box feeds up to a switch mounted above the fuse box and then the wire on the other side of the switch runs back into the fuse box and seems to be terminated there. I cannot really see where it is terminated because it is behind the fuses.

I cannot see any holes in the boxes to suggest there were other cables that would have run any where else. Operating the switch does not appear to do anything.

Could anyone tell me why this arrangement might be in place ?

 

[RF Lighting]

Possibly to isolate a transformer for an old doorbell system?

 

[jeffwestrop]

It seems unlikey as there is an old door bell system fed from the house and no sensible route from the garage to the door bell.

 

[AdrianUK]

Many, many possibilities.......

Isolator for PIR floodlight?

Switch for additional garage lights removed by previous owner?

The 5A fuse suggests probably some kind of lighting/low current load but could be almost anything along that line.

I guess leave it switched OFF and see if you notice anything that doesnt work anymore

 

[securespark]

I cannot see.....have you posted a picture?