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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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    IF there are no plugs and sockets, then the RCDs are not required by regulation, so long as the loop impedance is low enough (the fault current would be high enough)  to operate whatever MCB or fuse is protecting.

    Having said that, where liquids and electrics meet RCDs are a very nice thing to have, even if the RCD covers more than one immersion heater.

    (https://www.tlc-direct.co.uk/Products/WYWRS32slash4.html) sort of sized object.
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  • 0
    IF there are no plugs and sockets, then the RCDs are not required by regulation, so long as the loop impedance is low enough (the fault current would be high enough)  to operate whatever MCB or fuse is protecting.

    Having said that, where liquids and electrics meet RCDs are a very nice thing to have, even if the RCD covers more than one immersion heater.

    (https://www.tlc-direct.co.uk/Products/WYWRS32slash4.html) sort of sized object.
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