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AFDD on minor works ?

roger Farnsworth

I've a really small job to quote  ( adding a fused spur off an existing radial )  in a care home ,with a decent , but fairly old wylex board  . am  i right in assuming i have to fit an AFDD ?? , I know i would if it was a new circuit being installed , but being only a fused spur off an existing radial , it seems a massive expense for what is supposed to be an easy job ??  can't seem to find any conclusive answers on line anywhere .

any thoughts would be appreciated 

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    Hi roger. I have always followed that  it’s not a requirement to upgrade an existing circuit to include AFDDs when carrying out simple maintenance work such as like-for-like replacements. The requirements of BS 7671 are not retrospective, so, existing installations do not require upgrading. Also you don’t need to install AFDDs for FCUs, because regulation 421.1.7 only applies to socket outlets not exceeding  32 A. Your work is not adding any sockets, so I would say you are not affected by this reg.

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    Hi roger. I have always followed that  it’s not a requirement to upgrade an existing circuit to include AFDDs when carrying out simple maintenance work such as like-for-like replacements. The requirements of BS 7671 are not retrospective, so, existing installations do not require upgrading. Also you don’t need to install AFDDs for FCUs, because regulation 421.1.7 only applies to socket outlets not exceeding  32 A. Your work is not adding any sockets, so I would say you are not affected by this reg.

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