The latest version of IET wiring regulations BS7671 Amendment 2 is now a requirement for new UK electrical installations. One of the major changes is the mandatory use of Arc Fault Detection Devices AFDDs in certain types of buildings and applications.

BS7671 AMD2 Effective date 28th September 2022

In partnership with Lewden Palazzoli, we’ve produced this training module to help update electricians, specifiers and electrical wholesalers.

For more FREE Training modules, checkout eFIXX Know How
https://www.efixx.co.uk/knowhow
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00:00 AFDDs
00:39 Content elements
01:11 Circuit protection
01:50 Overload
02:07 Short circuit
02:35 Old fuses
03:03 Insulation
03:35 RCD
04:07 Arc faults
05:34 Series and parallel arcs
06:11 What is a parallel arc
06:57 Exception to the rule
07:54 Protection for the pugged in load(s)
08:25 AC waveform
08:37 Arc fault waveform
08:53 Inside an AFDD
09:40 Will sparks cause an AFDD to trip
10:44 Overvoltage protection
10:57 Do I still need a type 2 SPD
12:40 Self-test function
13:33 The LED on the AFDD
14:06 What the Regs say about AFDDs
16:00 What does recommend mean

Complete the AFDD CPD training module
http://hub.efixx.co.uk/lewden-afdd-cpd

Eaton AFDD+ – Incorporating the next generation of detection technology, the Eaton AFDD+ provides enhanced fire protection, what reduces the risk of electrically ignited fires, by detecting arc fault currents other protection devices can’t.

So the two Pauls took a trip to Vienna to the R&D labs of Eaton to gain assurance, learning, and confidence in what is new to the UK in AFDD devices.

The arc fault detection device (AFDD) S-ARC1 provides maximum safety in the electrical installation of all buildings, thus protecting people and valuable assets. By early detecting arc faults and disconnecting the affected circuit the AFDD offers reliable protection with easy installation, bridging the gap of series arc faults which cannot be detected by MCBs.
Combined with a Residual Current Circuit Breaker (RCCB) as upstream device, the S-ARC1 series provides the best solution for complete protection in the switchboard.

https://youtu.be/uAorINs1DAM

https://youtu.be/fnEgu4mlpGs

AFDD identify dangerous faults caused by arcing in electrical circuits and are designed to switch off the circuit before a fire occurs. Under the 18th Edition of the Wiring Regulations and beyond wider use of these types of devices is expected. This video shows a practical demonstration of an AFDD clearing an arc fault in circuit,

All about the AFDD (or AFCI).
Also available in article form on my website with some updated information:

https://www.dses.co.uk/index.php/free-advice/194-the-arc-fault-detection-device