which is the besst way?

[thekingiam]

rewired all the house and forgot about light in pantry where consumer unit is.
would it be beter to run a cable from cu and put an extra mcb in, i have to put a socket in there as well from a 16 mcb so i could connect from the socket to a fcu into lighting circuit as well which would you do?

 

[Taylortwocities]

You don't need a whole new circuit. Also if you add a new circuit then it's notifiable.
Personally i would add another connection to the existing downstairs lighting MCB and run that to the pantry switch/light.
Run a spur from the consumer unit's downstairs socket mcb to power the socket.

 

[telectrix]

as above^^^ K.I.S.S. , as my old boss used to say.. "keep it simple, stupid."

 

[thekingiam]

i was thinking of running a cable to existing lighting mcb but was thinking of segregation of circuits. i suppose it makes no difference as the mcb controls lights,what about when i come to test would i group it with all lights on that mcb?
if i connected the socket to the 32 amp ring main mcb when i come to test would i use this spur to get my readings for R1 and R2.

 

[steveberry11]

I guess you used the loop in system with feeds going to the rose. Pull the feed out of the CU take it to the new position and install a new length of cable back to the CU, and a switch wire.

 

[Farmelectrics]

thats the one steve you beat me to it just starting to type that out lol

 

[Engineer54]

You don't need a whole new circuit. Also if you add a new circuit then it's notifiable.
Personally i would add another connection to the existing downstairs lighting MCB and run that to the pantry switch/light.

I would have thought better to come off the upstairs lighting circuit, at least then you would have light in the pantry to see what you are doing at the CU, if the downstairs lighting breaker tripped.. lol!!!

 

[telectrix]

good point, eng. and as steveberry says. just make it the first light on the existing circiut .

 

[Dave 85]

I think the best design is to have it on the main switch (no RCD protection) with the switch drop in mini trunking.
For obvious reasons.

 

[telectrix]

only if he's got a hi integrity board, though.

 

[thekingiam]

wouldn't want to pull back cable as i have had difficulty getting all cables to cu as it is .
as you can see not much space to drop cables. lighting cables in 25 mm trunking on the right and i need them on the left, running a new circuit from cu would save me alot of sress and effort, would i need a seperate mcb for 1 light or connect to existing mcb in cu?

 

[Dave 85]

TBH mate it really doesn't matter what you do. The most important thing is that you do whatever is quickest and easiest so you can get yer feet up earlier.

 

[thekingiam]

before and after

 

[thekingiam]

could non rcd protect in mini trunkiing, but tt system so main rcd usually trips out everything first before split load rcd s in cu.

 

[thekingiam]

just thought ide show another pic of conduit going to other side of kitchen to bond incoming water.