scope:

This International Standard applies to sound signalling devices with integral enclosures or to sound signalling devices intended to be fitted into or supplied with enclosures according to IEC 60670 intended for household and similar purposes with rated voltages not exceeding 250 V a.c. or 250 V d.c. and with rated power inputs not exceeding 100 VA. In these sound signalling devices an indicating light having a rated input power not exceeding 10 VA may also be incorporated. These products are designated as "devices" throughout the remainder of the text. This standard applies to fixed, portable and plug-in devices for indoor or outdoor use. In locations where special conditions prevail, special constructions may be required. NOTE 1 This standard or parts of it may be used as a guide for sound signalling devices having a voltage less than 50 V a.c. or 75 V d.c. Additional requirements for sound signalling devices having a voltage less than 50 V a.c. or 75 V d.c. are under consideration. NOTE 2 This standard does not cover the radio transmitting or receiving functions.