14EATON CORPORATION BR003010ENWhat is the scope of the standard?The standard applies to electrical installations with regard to measures for the protection of persons, livestock and property against– thermal effects, combustion or degradation of materials, and risk of burns caused by electrical equipment,– flames in case of a fire hazard being propagated from electrical installations to other fire compartments segregated by barriers which are in the vicinity, and– the impairment of the safe functioning of electrical equipment including safety services.The use of AFDDs satisfies as special measure to protect against arc faults in final circuits– in premises with sleeping accommodation,– in locations with risks of fire due to the nature of processed or stored materials,– in locations with combustible constructional materials– in fire propagating structures,– in locations with endangering of irreplaceable goods.Where does the standard recommend the installation of AFDDs?AFDDs are recommended to be installed in final circuits of hotel rooms, sleeping rooms in kindergartens or homes for the elderly, barns, wood-working shops, stores of combustible materials, wooden buildings (e.g. mountain cabins), national monuments, museums and other public buildings, such as railway stations and airports, but also laboratories, computer centres and certain industrial and storage facilities.Do I have to retrofit my installation?Retrofitting is only legally required if the system is being technically changed, i.e. in the case of a significant change to the system as well as to parts of existing systems that may be influenced by an extension or modification process. However, retrofitting should be considered in all cases if there is a chance of damage and an effective protection is technically feasible.IEC 60364-4-42Frequently asked questions about the application of the standard
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