Hi guys,
Ive opened up a can of worms on a job and need a bit of advice although i pretty much think i know the answer just after confirmation to my nightmare scenario.
I am in the process of partially rewiring a house which will be notified to building control.
on initial testing the r1 +r2 on all the sockets was fine, the insulation resistance was fine so i thought i should be in a good position to change the board with little disruption as the lights were all earthed etc.
2 wires were going into the circuit breaker for the power circuit so presumed it was either a ring circuit or 2 radial circuits. Cable size is 2.5mm
There are 11 sockets on the circuit so worst case 2 radials wouldnt be an issue.
I have lifted up a couple of floor boards and found a junction box with 2.5mm cable coming out of it. There is the 2.5mm from the consumer and 3 cables coming out which are going to the sockets. this is the same on the other 2.5 coming off the mcb. So in effect i have 2 "spider ciruits" both going into junction boxs then going off to the sockets.
Im concerned that i now have a spur off a spur off a spur etc and also possible cable underrating. If it was 2 radials i was going to just split them up
I really dont want to have to rewire the whole house but i now cant trust the design as there could be junction boxes anywhere?
Any suggestions other than a complete rewire of the power circuits as i know these spiders are not best practise on a lighting circuit never mind a power circuit.
Ive opened up a can of worms on a job and need a bit of advice although i pretty much think i know the answer just after confirmation to my nightmare scenario.
I am in the process of partially rewiring a house which will be notified to building control.
on initial testing the r1 +r2 on all the sockets was fine, the insulation resistance was fine so i thought i should be in a good position to change the board with little disruption as the lights were all earthed etc.
2 wires were going into the circuit breaker for the power circuit so presumed it was either a ring circuit or 2 radial circuits. Cable size is 2.5mm
There are 11 sockets on the circuit so worst case 2 radials wouldnt be an issue.
I have lifted up a couple of floor boards and found a junction box with 2.5mm cable coming out of it. There is the 2.5mm from the consumer and 3 cables coming out which are going to the sockets. this is the same on the other 2.5 coming off the mcb. So in effect i have 2 "spider ciruits" both going into junction boxs then going off to the sockets.
Im concerned that i now have a spur off a spur off a spur etc and also possible cable underrating. If it was 2 radials i was going to just split them up
I really dont want to have to rewire the whole house but i now cant trust the design as there could be junction boxes anywhere?
Any suggestions other than a complete rewire of the power circuits as i know these spiders are not best practise on a lighting circuit never mind a power circuit.