S
sbelec
Hi,
I am wiring up an electric flow boiler, basically a central heating wet system run from a 9kW boiler. In the instance I have now I would like to install an unmarked cooker switch, main switch for the supply and the socket for the control system (I would like an FCU - but cannot find anyone who makes them). Any issues?
The problem I have had in the past is with the RCD configuration, both the control system and the boiler must run on the same RCD as nuetrals get confused with boiler controlled pump over runs. When over-run comes on the RCD trips.
In this situation I may have to run an RCBO as the boiler and the controls from elsewhere hence my problem. In the past I have run an oversized supply from an MCB to a secondary local "garage" CU with RCD main switch, MCB boiler and MCB controls, discrimination becomes the issue as MCB's go from 40 or 45 to 63 and in this case more of a problem.
With more and more of these about we really need a 45 amp main switch with a built in unswitched FCU - manufacturers?
thanks for your comments
I am wiring up an electric flow boiler, basically a central heating wet system run from a 9kW boiler. In the instance I have now I would like to install an unmarked cooker switch, main switch for the supply and the socket for the control system (I would like an FCU - but cannot find anyone who makes them). Any issues?
The problem I have had in the past is with the RCD configuration, both the control system and the boiler must run on the same RCD as nuetrals get confused with boiler controlled pump over runs. When over-run comes on the RCD trips.
In this situation I may have to run an RCBO as the boiler and the controls from elsewhere hence my problem. In the past I have run an oversized supply from an MCB to a secondary local "garage" CU with RCD main switch, MCB boiler and MCB controls, discrimination becomes the issue as MCB's go from 40 or 45 to 63 and in this case more of a problem.
With more and more of these about we really need a 45 amp main switch with a built in unswitched FCU - manufacturers?
thanks for your comments