the low‑voltage bathroom extractor fan and the fused spur

[Zehroni]

The item about the kitchen sockets being 'spurred from a 6mm cable' is useless, as it doesn't explain what the problem is.
What size of cable? One cable for both sockets or a separate cable for each? How is the cable / cables installed? Is the problem the socket on a 40A MCB? What exactly is this 'fused spur' that apparently is needed?

I had the time to investigate this issue further and the existing connection is shown in the picture. I managed to move the cable from the 40A MCB to to spare 32A MCB Where about I need to fit the FCU. All the cables are behind the kitchen wall tiles.

 

[Zehroni]

Another issue reported in the EICR i.e “Sockets ring circuit isn’t continuous” I have traced the power sockets circuits of the house to day and the below diagrams illustrate the existing connection. I understand what the electrician reports the above, he thinks the cables connect to 32A MCB are for the house socket ring circuit. However, the diagram below shows they are 2 radial circuits connected to one 32A MCB. I have moved the upstairs 2 sockets (S6 and S7 in the diagram) to 16A MCB.

What shall I do with downstairs sockets (S1,S2,S3,S4,S5)to make it compliance. I thinking of replace the 2.5mm cable which runs from CU to JB1 with 4mm cable and leave the circuit connected to 32A MCB as is now would that work?

 

[Ragnar_AT]

Yes, replacing that bit of cable with 4 mm2 should do.
I‘d probably put the kitchen sockets onto a 20 A MCB, then the 2.5 mm2 is fine and you get more power than with an FCU.

 

[Murdochcat]

It’s ask very well you tinkering about but you will need certification to say it’s been done properly and tested

How do you think you’ll achieve this?

 

[Zehroni]

It’s ask very well you tinkering about but you will need certification to say it’s been done properly and tested

How do you think you’ll achieve this?

my electrician will come back and retest and issues a satisfactory EICR

 

[Zehroni]

.
I‘d probably put the kitchen sockets onto a 20 A MCB, then the 2.5 mm2 is fine and you get more power than with an FCU.

that is much better solution, the 6mm cable only feeds those 3 sockets and nothing else. Hence the 20A MCB will be OK to protect the 2.5 mm cable in between the sockets