Arc fault protection devices (AFDD) use microprocessors to identify characteristic current flow and voltage curves that indicate an arc fault and automatically trip the affected circuit.
This significantly reduces the risk of fire due to faulty conductors and connections. The protective function of the AFDD has already proven its worth internationally, and has been used in Germany since February 2016.
The 18th edition of BS 7671, when published in July, recommends the use of these to provide additional protection against fire.
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