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Are RCD's Required?

Nano Brewery
Hi, looking to understand if an RCD would be a required regulation (and/or just highly recommended) in the following situation.  The additional cost of installing four or five 3-Phase RCDs is quite substantial and I would prefer to avoid it if still deemed as safe and not legally required.  Earthing system is TN-C-S.


For connecting up 4x Immersion Elements (9kW, 9kW, 6kW, 3kW) in Brewery Tanks I am looking at either:


A.  SWA Cable clipped direct to basket from the Control Panel to IP rated Plugs/Sockets mounted on the wall.  Then floating SY Cable (recommended by electrician) from the wall to the Tanks, which is about a 2m run.  Thinking Plugs/Sockets just to make life easy if I ever want to move things around and also for easier access for cleaning.


B.  Same as above but swapping the Plugs/Sockets for Isolators.


Look forward to your feedback and opinions.  Cheers.
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  • 0
    Wondering if a direct feed from a Distribution Board RCD to the Control Panel could be an option for universal protection at less cost? Is this possible and allowed? Alternatively, maybe Tails split via a Henley Box >>> RCD (stand alone) >>> Control Panel?

    Definitely not tails to RCD to control panel - you'd need some circuit overcurrent protection in there. MCB (or fuses) in the DB, to a separate RCD (usually an RCCB) and thence to the control panel sounds reasonable. If you wanted to avoid going through the existing DB (perhaps it doesn't have sufficient spare capacity) you could have separate switchfuse or small DB - but then you'd have to be careful if the exiting DB's incomer acts as the main switch for the installation - if so you'd likely need something extra upstream. But as before, it's hard to be sure on the best approach without being able to see the complete situation.

       - Andy.
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  • 0
    Wondering if a direct feed from a Distribution Board RCD to the Control Panel could be an option for universal protection at less cost? Is this possible and allowed? Alternatively, maybe Tails split via a Henley Box >>> RCD (stand alone) >>> Control Panel?

    Definitely not tails to RCD to control panel - you'd need some circuit overcurrent protection in there. MCB (or fuses) in the DB, to a separate RCD (usually an RCCB) and thence to the control panel sounds reasonable. If you wanted to avoid going through the existing DB (perhaps it doesn't have sufficient spare capacity) you could have separate switchfuse or small DB - but then you'd have to be careful if the exiting DB's incomer acts as the main switch for the installation - if so you'd likely need something extra upstream. But as before, it's hard to be sure on the best approach without being able to see the complete situation.

       - Andy.
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