Arc Fault Protection Device 18th Edition. This is caused when the electrical current ionizes gases in the air temperatures created by arcing can exceed 6000 c. Bs7671 2018 was released on the 1 st july 2018 and will become effective from 1 st january 2019 but the new edition can be used immediately.
The 18th edi tion of bs 7671 when pub lished in july re com mends the use of these to provide ad di tional pro tec tion against fire. The 18th edition wiring regulations require designers and installers to ensure that their installations are designed and constructed so that the risk of ignition from high temperatures or electric arc is minimised. Premises with sleeping accommodation.
For additional protection against electrical fires 421 1 7 afdd is a new addition to the 18th edition of the wiring regulations and have been included to provide protection against arc faults that can lead to electrically ignited fires.
We have put together a complete guide to help you better understand what an afdd is why and if you need one how they work and the different types available for domestic dwellings. Arc fault detection devices afdd arcs are visible plasma discharges caused by electrical current passing through a normally nonconductive medium such as air. The 18th edition wiring regulations require designers and installers to ensure that their installations are designed and constructed so that the risk of ignition from high temperatures or electric arc is minimised. More than 7 500 of those are reported to be in electrical distribution with the balance involving electrical appliances.
