8EATON CORPORATION BR003010ENWhat has changed in the IEC 60364-4-42 and when did the change become effective?In comparison with the edition from 2010, in Amendment 1 of 60364-4-42 significant changes were made in November 2014. These are, amongst others:a) inclusion of additional recommendations for automatic disconnection in case of dangerous electric arcs via arc fault detection devices (AFDDs);b) inclusion of an informative Appendix A for arc fault detection devices (AFDDs).These changes have been effective since the 13th of November 2014.What are the new recommendations?Arc Fault Detection Devices (AFDDs) in accordance with IEC 62606 are now recom-mended in final circuits:• In premises with e.g. hotels and hostels, daycare sleeping accommodations: centres for children, nurseries, facilities that care for the elderly and sick, schools, residential buildings and apartments• In locations with risks of fire e.g. barns, wood-working shops, due to the nature of processed stores of combustible materials, or stored materials: paper and textile processing factories, agricultural premises• In locations with e.g. wooden buildings, buildings combustible materials: where the majority of the constructional material is combustible• In fire propagating structures: e.g. high-rise buildings, forced ventilation systems• In locations with endangering e.g. museums, national monuments, of irreplaceable goods: public premises and important infrastructure such as airports and train stationsWhy was a change necessary and why were these recommendations introduced?So far, the electrical protection concept was incomplete – the detection and effective disconnection of serial arc faults in installations was not possible. The danger substan-tiated by the fire damage and fire victim statistics can now be combatted – as there is now a new solution that fills this gap.IEC 60364-4-42:2010+AMD1:2014Changes in the standard for low-voltage electrical installations
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