- Reaction score
- 6,950
In this case it's BS7671:2018 421.1.7 would take precedence over local authority requirements as it is a statutory requirement.
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
fi rst. 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 fi re and rescue
services. Current legislation should be applied.
For all other premises, the use of AFDDs conforming to BS EN62606 is
recommended for single phase AC fi nal circuits supplying socket outlets
not exceeding 32A.
Where used, AFDDs shall be placed at the origin of the circuit to be protected
Wiring regs aren't statutory, but I'd certainly aim to work within their confines and consider a hostel to fall within the category of 'high risk residential building'.