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Additional connection to earth 411.4.2

Simon Mitchell

Hi,

Regulation 411.4.2 regarding TN systems now includes a recommendation to install an additional connection to earth using an earth electrode. There is no indication within the regs why you would or wouldn't fit one. The guidance on language on p18 of the regs equates "recommendation" to "should". Therefore we should install an earth electrode to all TN-S and TN-C-S systems.

I can't find any discussion on this when searching but it seems quite a big change to previous regs. Should we be installing earth rods as a standard?

Simon

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  • 0 in reply to OlympusMons

    Thanks for the link. With AFDDs, accepting they provide additional protection, I can see a reason for recommending it to the client - "you can have this as it's recommended, these are the benefits, but it'll cost ££££".

    With the additional earth connection (basically an earth rod), how am I backing up my recommendation to the client? "you can have this as it's recommended, for some unknown benefit, but it'll cost ££"

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