Use electric shower's circuit to install sockets

Discussion in 'Electricians' Talk' started by ProTofik, Aug 27, 2021.

  1. ProTofik

    ProTofik Member

    Well I have mostly fuses in my customer unit which I wanted to replace with MCB anyway so might as well do it when I do this job since the power will be off anyway.
  2. Bazza

    Bazza Screwfix Select

    You do not need to change that!. The 40A MCB is there to limit the current on the 10mm cable. Nothing changes.
    The current to your sockets will be limited by the (13A) fuse in the FCU.
    The circuit from the load side of the FCU to the sockets will be a radial. a ring is pointless.


    Well you could, but your better strategy would be to change the Hager board for a compliant one (all metal case and all circuits RCD protected). You gain nothing if you swop the fuse carriers for MCBs.
    PS Let me know if you do get rid of the fuse carriers. I have a home for those!
  3. ProTofik

    ProTofik Member

    Good point. So if I understand correctly, MCB is to protect the cables and you choose it based on what cable you terminate into it, not necessarily what you connect to the circuit (obviously you will always connect less than cable/MCB is rated for). Correct?
  4. The Happy Builder

    The Happy Builder Screwfix Select

  5. The Happy Builder

    The Happy Builder Screwfix Select

  6. Jimbo

    Jimbo Screwfix Select

    You're probably committed by now but if not... consider a heat pump if possible at your location. RHI will likely pay for most of it.
  7. Comlec

    Comlec Screwfix Select

    Not sure why you are removing the electric shower as it is always nice to have a backup in case of boiler problems, but I am sure you have already thought about that.
    As others have said you could down rate the MCB and fit sockets. You could consider a 'lollipop' circuit if you want to have a 32A MCB.

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