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Surge Protection requirements

aligarjon

Hi Guys.   Just a bit of advice if possible please  A basic large domestic property with a couple of CU's, one is via a sub-main out to an extension.  I have been asked to change the CU 's as there is no rcd protection. I will recommend surge protection to them as it's easy to do at this stage.  Would just at the intake position be enough or better at both.  Thre sub-main currently comes out of the first consumer unit.  If i do it that way i suppose 1 device covers everything. However if space allows i might split the tails and fit a switchfuse, in which case would that section want its own, and if so where.  My gut thought would be to fit one in each CU .

Gary

Parents
  • 0

    I will recommend surge protection

    I think BS 7671 requires a bit more than just a recommendation these days. Unless you can do the risk analysis of regulation 443.5 to show that SPDs aren't required, then you can't sign-off your work as complying with BS 7671:2018 without the SPDs.

       - Andy.

Reply
  • 0

    I will recommend surge protection

    I think BS 7671 requires a bit more than just a recommendation these days. Unless you can do the risk analysis of regulation 443.5 to show that SPDs aren't required, then you can't sign-off your work as complying with BS 7671:2018 without the SPDs.

       - Andy.

Children
  • 0 in reply to AJJewsbury

    Well, there's always the 443.4 [not .3 as I first wrote] 'single dwelling with little to lose' exception, but with an SPD being about £60 and houses these days choc full of LED lamps, TVs, routers, laptops, tablets, mobile phones, digital boiler controls etc, I can't see that it applies much if at all.

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