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External lighting columns - earthing conductor (reg 714.411.203)

Apostolos

Good afternoon

Sorry for the back to back question about external lighting

Based on regulation 714.411.203:

'Where street furniture is connected directly to a distributor's PME network, the earthing conductor and any main protective bonding conductors to any extraneous-conductive parts shall have a minimum copper equivalent CSA of 6mm2 for PEN conductors of the supply with copper equivalent CSA up to 10mm2. For larger sized neutral conductors, the main bonding shall comply with Table 54.8.'

If I have lighting columns at the back of a building and I am feeding them from inside the building, and the building system is a PME system, does this apply?

Its wording confuses me really because it says about connection directly to a DNO PME network....

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    Apostolos said:
    If I have lighting columns at the back of a building and I am feeding them from inside the building, and the building system is a PME system, does this apply?

    If you are after the consumer's meter in a building, this does not apply. As others have said, this is for unmetered supplies, such as those used for feeding street lighting direct from a distribution main in the street. The arrangement would be familiar to anyone who has done street/highway works, perhaps not so if you've only worked in buildings and on private land (perhaps give or take old MOD/government premises).

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    Apostolos said:
    If I have lighting columns at the back of a building and I am feeding them from inside the building, and the building system is a PME system, does this apply?

    If you are after the consumer's meter in a building, this does not apply. As others have said, this is for unmetered supplies, such as those used for feeding street lighting direct from a distribution main in the street. The arrangement would be familiar to anyone who has done street/highway works, perhaps not so if you've only worked in buildings and on private land (perhaps give or take old MOD/government premises).

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