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Exported PME to steel floodlight columns, public tennis courts

Patrick Hammond

Hi

We're doing an EICR at a local tennis club. It has a number of  3 phase floodlights mounted on galavanised columns illuminatimg outdoor tennis courts.

They are earthed via an exported PME TNCS system which was surprising because we'd imagined they would have sunk an earth rod at each column and not exported the PME.

The location is open to the public. Circuits not 30mA RCD protected foir additional protection.

I'm no

Many Thanks for your help

  • 0 in reply to Sparkingchip

    Hmmm  that is strange as it's  already covered in 411.3.4 and domestic fall outside anything listed in 714.411.3.4

  • 0

    For interest only, I just had a peep at 714 in the Irish Regs, also founded on 60364. 30mA RCD protection is not required for luminaires mounted at a height of +2.8m. Like 7671, the term luminaire does not include the column. Also, in common with 7671 IPXXB or IP2X is required with the enclosure open. So, I would agree with Patrick that the rather poor design of the arrangement inside the column that he describes warrants a code 2. I have seen too many of this type of enclosure either defective or missing to have anything less.

  • 0

    For interest only, I just had a peep at 714 in the Irish Regs, also founded on 60364. 30mA RCD protection is not required for luminaires mounted at a height of +2.8m. Like 7671, the term luminaire does not include the column

    Ah, thanks for that! It's nice to know I'm not alone, even if I'm wrong!

    One none compliance that nearly passed me by and (had to read it twice) was 714.411.201the door in the street furniture used for access not to be used as barrier or enclosure. This installtion had an unenclosed din rail with MCBs screwed to a metal plate in the column, so C2 for that anyway.

    Its not entirely ignored as an enclosure - as I read it with the door open it only need to provide basic protection - so unsheathed wires would be OK for instance - and live parts need only to have IP2X (or IPXXB) (finger) protection - which a lot of MCB terminals comply with. Whether the bared wires into the MCB do, is perhaps more questionable. So maybe not an open and shut case as it were.

        - Andy.

  • 0

    Absolutely right AJ. I assumed that in the OPs case the MCBs were set on to a bare busbar. If not, andIP2X or IPXXB is in place then no issue. 
    That being the case, I would have no issue with any aspect although I concur that the absence of 30mA RCD required by 7671 is worth further consideration if one was setting out a design. In that regard, where the luminaire is mounted below 2.8m, IS10101 requires that due regard is given to the failure of the illumination in terms of slips, trips and falls and, as a minimum, requires the circuits to be sub-divided. 

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