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===United Kingdom===
In the UK, the [[BS 7671|Wiring Regulations]] 18th edition (BS 7671:2018) is the first edition to make any mention of arc fault devices, and indicate they may be installed if the design has an unusually high risk of fire from arc faults. The annexes relating to testing indicate that when AFDDs are installed, their correct operation must be verified before completion, but the method of testing is not described. This is in contrast to [[Residual-current device|RCDs]] where a number of trip times at different fault current levels must be verified.<ref>{{cite web |title=IET website wiring matters |url=https://electrical.theiet.org/wiring-matters/issues/71/ |website=theiet.org}}</ref>
[[File:Siemens AFDD combination LS or FI.png|thumb|upright=0.8|AFDD combination circuit breaker circa 2012
===Germany===
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