AFDDs needed in CU's over the 6th floor or all CU's?

[Other_Tucker]

Work has booked me in for a CU change on the second floor of a 7 storey block of flats. They are under the impression that AFDD's only need too be fitted in the flats over 18m high, or the 6th and 7th floors. I'm pretty sure the regs 421.1.7 mean all flats in a block that high but it's ambiguous.

What do you think?

 

[Dustydazzler]

I read it as ALL flats in a High Rise and ALL HMOs need Arc Fault Detection

 

[littlespark]

Tell them your concerns, but when it comes to testing, put someone else’s name on the “design” part

 

[newfutile]

Its in all of the higher risk residential building

421.1.7
Arc fault detection devices conforming to EN62606 shall be provided for single phase AC final circuits supplying socket outlets with rated current not exceeding 32A in:
• Higher risk residential buildings
• Houses of multiple occupancy (HMO) • Purpose built student accommodation • Care homes
NOTE 1: Higher Risk Residential Buildings are assumed to be residential buildings over 18m in height or in excess of six storeys, whichever is met first. It is anticipated that in many areas, higher risk residential buildings will be defined in legislation which can be subject to change over time, as well as in risk management procedures adopted by fire and rescue services. Current legislation should be applied.