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AFDD speculation and planning around future requirements

E95

Hi,

We currently have a large number of obsolete distributions boards, we're currently looking at specifying a replacement and phased changed out of the obsolete distribution boards. 

I'm concerned about future requirements around AFDDs. Could it be the case that AFDDs are mandated for some or more circuits in the short term future, 'shall' as opposed to the current 'should'?

How can we realistically spend a significant amount of money on boards that may leave us unable to add circuits to in the future?

I understand we can't predict the future, however does anyone have any thoughts on the likelihood of this? I understand the obvious option is to use AFDD compatible boards however I'm struggling to location 3ph boards with correct number of ways within maximum physical dimensions.

The only DB that I have found suitable for other criteria has AFDD units that take up three ways for a single phase circuit!

Regds

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    E95 said:
    The only DB that I have found suitable for other criteria has AFDD units that take up three ways for a single phase circuit!

    I think that I know the ones that you mean and they are definitely not cheap.

    How obsolete is obsolete and does it matter? Whilst the regulations are not retrospective, I suppose that there comes a time when the replacement of old DBs even in excellent condition is desirable. Another reason may be that spare parts are no longer available (though eBay is your friend here).

    Let's face it, any board installed today may be obsolete with the next version of BS 7671 so I wouldn't worry about it.

    I suggest that 40 - 50 years is a reasonable lifespan for a DB.

  • 0 in reply to Chris Pearson

    Essentially it is unfeasible for us to procure OEM BS 3871 MCBs, DBs are approx. 50 years old so construction standards have advanced numerous times, BS 3871 isn't recognised OCPD within current amendment and BS 3871 doesn't guarantee isolation gap!

  • 0 in reply to E95

    Exactly! I am currently replacing my DBs at home in slow time. I assume that I am currently safe, but I don't know.

    The difference between you and me is that I can make a choice at home whereas you have to bear in mind the H&S Etc Act 1974! 

    That said, I don't think that you need to aim to future proof your installation(s).

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  • 0 in reply to E95

    Exactly! I am currently replacing my DBs at home in slow time. I assume that I am currently safe, but I don't know.

    The difference between you and me is that I can make a choice at home whereas you have to bear in mind the H&S Etc Act 1974! 

    That said, I don't think that you need to aim to future proof your installation(s).

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