This standard defines the constructional and operational characteristics, the safety requirements, test methods and the marking of regulators and automatic change-over devices having a maximum regulated pressure of 4 bar, with a maximum capacity of 100 kg/h, for use with butane, propane and their mixtures in the vapour phase. This European Standard also applies to the safety devices which are included within regulating devices covered by this standard. The characteristics of these safety devices are given in annexes A and B. This standard also includes the requirements for: adaptors for connecting to self closing valves; remote supply-reserve indicators; remote safety devices. For the purpose of these standards: Regulators and automatic change-over devices are referred to as "regulating devices"; Regulators, automatic change-over devices and adaptors are referred to as "devices" The requirements apply to devices used in locations where the temperature likely to be reached during use is between -20 °C and +50 °C. Additional requirements for devices to be used at temperatures below -20 °C are given in Annex C. Additional requirements for regulating devices intended to be used in caravans, motor caravans and freshwater boats are given in annex D. Additional requirements for regulating devices intended to be used in seawater boats are given in Annex M. For specific uses in caravans motor caravans and boats (freshwater and seawater), the automatic change over devices function may also be carried out by an assembly of regulators, forming a "automatic change over devices system" as defined in 3.. This European standard does not include the installation rules for devices and their possible associated safety devices. In this matter, reference should be made to national regulations in force in the member countries. All connection and their used in various countries are given in annexes G and H; Drawings of cylinder valve connections are given in EN 15202; Drawings of cartridge connections are given in EN 417; Drawings of other connections are given in annexes G and H where the device part is normative. The other part applies to the part to be connected to the device, is given only for test purposes and is not normative.