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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
    nobody commented on the use of SY, Wouldn't HO7 be the right cable to use here?

    Hard to say. H07RN-F type are certainly reasonably tough, but they're not indestructable. If the environment was such that there was a reasonable risk of the flex being cut into or otherwise damaged through to the conductors, then having some means of triggering automatic disconnection (by means of the steel braid being earthed) might be a little more reassuring than just relying on the insulation & sheath. SY does have its challenges - not least its lack of direct recognition under UK standards, and some care might be needed to ensure that any particular version is adequate for the purpose (including the braid's adequacy as a c.p.c.) - but manufacuters data can sometimes help there.


       - Andy.
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  • 0
    nobody commented on the use of SY, Wouldn't HO7 be the right cable to use here?

    Hard to say. H07RN-F type are certainly reasonably tough, but they're not indestructable. If the environment was such that there was a reasonable risk of the flex being cut into or otherwise damaged through to the conductors, then having some means of triggering automatic disconnection (by means of the steel braid being earthed) might be a little more reassuring than just relying on the insulation & sheath. SY does have its challenges - not least its lack of direct recognition under UK standards, and some care might be needed to ensure that any particular version is adequate for the purpose (including the braid's adequacy as a c.p.c.) - but manufacuters data can sometimes help there.


       - Andy.
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