I am about to have my house rewired to 17th edition and have bought a dual RCB consumer unit. The feeds for the 2 RCDs from the main switch are already in place (bought with RCDs and MCBs all in).
I have read that the fire alarms should be on an independant circuit and not protected by an RCD.
Problem I have is im unsure if this cu I have bought (Wylex NH Range Dual RCD Split Load 10 way), has space for an RCBO.
So the questions I have are:
1) Can the fire alarm be run from an RCD protected circuit or is this a complete no-no?
2) There are 4 cables (2 neutral, 2 live) from main switch to 2 RCDs - it is possible to run additional cable from here (main switch) direct to single RCBO so not protected by RCD (what size would be needed - its looking pretty crowded at the base of the main switch)?
3) Do i need to take this cu back to shop and buy something different?
I have struck a deal with my sparky that i will do a lot of the donkey work - lifting floorboards, buying materials a) to reduce costs and b) he is extremely busy so it trying to squeeze me in - i have known him for years and trust him so will happily wait a bit but i don't want him coming if i don't have everything in place for when he arrives. I would ring him but the lucky get is on holiday in France..
Your help would be greatly appreciated.
I have read that the fire alarms should be on an independant circuit and not protected by an RCD.
Problem I have is im unsure if this cu I have bought (Wylex NH Range Dual RCD Split Load 10 way), has space for an RCBO.
So the questions I have are:
1) Can the fire alarm be run from an RCD protected circuit or is this a complete no-no?
2) There are 4 cables (2 neutral, 2 live) from main switch to 2 RCDs - it is possible to run additional cable from here (main switch) direct to single RCBO so not protected by RCD (what size would be needed - its looking pretty crowded at the base of the main switch)?
3) Do i need to take this cu back to shop and buy something different?
I have struck a deal with my sparky that i will do a lot of the donkey work - lifting floorboards, buying materials a) to reduce costs and b) he is extremely busy so it trying to squeeze me in - i have known him for years and trust him so will happily wait a bit but i don't want him coming if i don't have everything in place for when he arrives. I would ring him but the lucky get is on holiday in France..
Your help would be greatly appreciated.