blue fuse 15A fuse

[pushrod]

have a 6 way consumer unit with 3 white (6 amp) cartridges - upstairs lights, downstairs lights and porch light; 2 red (30 amp) cartridges - ring for both upstairs and downstairs and a cooker radial. The combi boiler is a fused 3 amp spur ( i think off the ring ). There are no outside lights and no garage, the house is a small 2- bed about 30 years old. So what is the blue 15 amp fuse for? Have taken it out and been round the house checking for what is no longer working and can't find anything. It is connected to a cable and has fuse wire in it.

 

[adnarim]

could have been supply to immersion heater in airing cupboard,either not used now,or sometimes used to feed combi via fsu,so take a look in airing cupboard if there is one.

 

[pushrod]

There is a small cupboard upstairs above the stairwell, but no signs of any wiring or sign that there has been a hot water tank/ immersion heater in there. I wondered whether 30 years ago they would have put in a separate radial circuit to a bathroom radiant heater?

 

[lister]

99% of the time it was immersion feed,
Whats the job? if it was me and lets say it was cu change and i cant find any thing not working i would leave if disconnected and explain this to the customer, chances are some plumber will have taped it up under a floorboard somewhere and i would rather go back if the customer finds something not working than leave it live.

 

[WarrenG]

99% of the time it was immersion feed,
Whats the job? if it was me and lets say it was cu change and i cant find any thing not working i would leave if disconnected and explain this to the customer, chances are some plumber will have taped it up under a floorboard somewhere and i would rather go back if the customer finds something not working than leave it live.

Well said

 

[pushrod]

99% of the time it was immersion feed,
Whats the job? if it was me and lets say it was cu change and i cant find any thing not working i would leave if disconnected and explain this to the customer, chances are some plumber will have taped it up under a floorboard somewhere and i would rather go back if the customer finds something not working than leave it live.

the exact problem - thanks lister. How would you leave the disconnected cable ?(at the CU end)

 

[lister]

yes
leave it in the cu, dont cut it short........just in case.

 

[eskimo39]

the exact problem - thanks lister. How would you leave the disconnected cable ?(at the CU end)

Could you terminate in a terminal block and then fasten this into a Chocbox, will this fit inside the CU?

If not I have been taught that a safe way to make ends safe is to split the cable to about 1 inch and cut off the earth. The about halfway back towards the end cut off the Neutral and then tape the end 1.5 inches. This will prevent the three wires ever touching. Also if it going to be kept inside the CU it should be pretty safe.

I know you don't really need to make that end safe but I would always be wary and do this just in case.

 

[pushrod]

Thanks