Extra S/O

[pdenni]

hi there

I have to agree with crafty on this one, you have to be in a position when doing electrical work of not leaving yourself up for any sort of liability, and with my customers i will not even carry out work on rewireable boards and also if gas and water are not bonded and or correct diameter mains earth installed, you have to fit rcds or rcbos to any new circuits which ever works out cheaper or easier.
But also remember for a board change the whole property has to be tested and certified.

 

[BigJon]

Yeah I see where your coming from, Changing, testing and certifing is no problem and i'd hapily do it, and to be honest from a safety point of view prefer to do it, Just trying to save the wee women some £ and cover myself at the same time by installing the new circuit on an RCD.
Some jobs are more bother than they are worth lol

 

[comms]

The 1st fix is done and ring main cables back coiled up at the board.

So why not extend the ringmain from here then & use rcd sockets in the conservatory ?
Ok the whole circuit doesnt get rcd protection but you meet the regs with the srcd's.

 

[BigJon]

Its a new conservatory with a new ring main, these are the cables back at the board. The kitchen is existing and hasnt been touched.
Sorry i was maybe a little unclear in explaining.

 

[pdenni]

you could well use rcd sockets but you have to try and protect the circuit as much as possible and seeing as it is rewireable board which has dubious ability to give short circuit and overcurrent protection you would want to protect the circuit with the magic three so you are clear in the knowledge you have done all you could to protect the householder from electrical harm.

 

[BigJon]

Yep, but the problem i have is that there is no space to terminate the new ring in to the old board, so i thought the easiest way was to add a 2 way CU. Its getting power to this thats the problem as there is no space for a service connection block to split the tails.
Cheers for your input

 

[pdenni]

by the time you have squeezed in a 2 way board wouldnt it be easier to replace the whole lot, and then not worry about using a henley block

 

[BigJon]

yeah i was wanting to go down that road, i'll just need to have another chat with the wee women and highly recommend she replaces the whole lot, cheers.

 

[comms]

Its a new conservatory with a new ring main, these are the cables back at the board. The kitchen is existing and hasnt been touched.
Sorry i was maybe a little unclear in explaining.

So do as I said split an existing ringmain (personnaly I'd test the existing ringmain before extending) at the cu add your new legs to the existing ringmain, one new leg & one old leg to fuse, the other legs crimp & heatshrink together inside the cu. Now use srcd's in conservatory for use of equipment outdoors.
Gets you out of a hole & is compliant.

 

[plugwash]

Joining rings end to end is rather counterproductive and if you aren't carefull may seriously unbalance the ring.

Afaict there is nothing really wrong with just shoving two rings in one breaker, its a bit of an unconventional shape but its not in any way unsafe.

 

[Taylortwocities]

Only that the regs say one breaker = one circuit

 

[plugwash]

Then of course you come to the question of what defines a circuit.

 

[davelx]

Then of course you come to the question of what defines a circuit.

Something protected by one breaker! Chicken-Egg-Egg-Chicken