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Type 1 or 2 surge protection to consumer units within flatted development?

Jamie Falconer

IDNO supply up the building i.e. Bemco boards then communal metering to consumer units within each apartment. Building has LPS.

Type 1 +2 surge protection has been installed to landlord common areas switchboard.

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  • How are extraneous-conductive-parts (including the LPS) arranged? Could lightning surges be transferred into the flats without first passing through the intake position?

       - Andy.

  • in reply to AJJewsbury

    My point with all of this is - the regs tell us type 1 surge protection should be installed at the origin of the installation - therefore for a flatted development where there is an IDNO cable which terminates into a BEMCO then through the building to meters etc then technically where is the origin? The specialist is seeming to suggest that type 1 SPD should be installed *after* the meter therefore we have infrastructure running through the building before it is even protected?

  • in reply to Jamie Falconer

    But what might be damaged that connected to that pre-meter infrastructure?
    Are the distribution lateral/ submains passive ? Certainly if all that is between that and the cable outside is more cable and fairly chunky fuse holder, then there is nothing delicate to protect, and in that case moving the protection nearer the possibly vulnerable load makes more sense.

    Mike

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  • in reply to Jamie Falconer

    But what might be damaged that connected to that pre-meter infrastructure?
    Are the distribution lateral/ submains passive ? Certainly if all that is between that and the cable outside is more cable and fairly chunky fuse holder, then there is nothing delicate to protect, and in that case moving the protection nearer the possibly vulnerable load makes more sense.

    Mike

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