This document specifies requirements@ test methods@ performance criteria@ and manufacturer's instructions for smoke alarms that operate using scattered light or transmitted light (Type A- optical) or ionization (Type B-ionization)@ intended for household or similar residential applications. This document includes additional requirements for smoke alarms which are also suitable for use in leisure accommodation vehicles. For the testing of other types of smoke alarms@ or smoke alarms working on different principles@ this document should only be used for guidance. The tests covered by this document are not intended to verify special features of smoke alarms or special characteristics that have been developed for specific risks. Where interconnection@ temporary disablement and alarm muting are included in the smoke alarm@ this document specifies applicable requirements. This document does not cover the requirements for devices intended for incorporation in systems using separate fire control and indicating equipment. Certain types of smoke alarms contain radioactive materials. The national requirements for radiation protection differ from country to country and they are not specified in this document. Such smoke alarms should@ however@ comply with the applicable national requirements.