This International Standard deals with the safety of electric instantaneous water heaters for household and similar purposes and intended for heating water below boiling temperature@ their rated voltage being not more than 250 V for single-phase appliances and 480 V for other appliances.NOTE 101? Instantaneous water heaters incorporating bare heating elements are within the scope of this standard.Appliances?not intended for normal household use but which nevertheless may be a source of danger to the public@ such as appliances intended for use in shops@ in light industry and on farms@ are within the scope of this standard.As far as is practicable@ this standard deals with the common hazards presented by appliances which are encountered by all persons in and around the home.? However@ in general@ it does not take into account-- the use of appliances by young children or infirm persons without supervision;-- playing with the appliance by young children.NOTE 102? Attention is drawn to the fact that-- for appliances intended to be used in vehicles or on board ships or aircraft@ additional requirements may be necessary;-- in many countries additional requirements are specified by the national health authorities@ the national authorities responsible for the protection of labour and similar authorities;-- in many countries regulations exist for the installation of equipment connected to the water mains.NOTE 103? This standard does not apply to-- appliances for boiling water (IEC 60335-2-15);-- storage water heaters (IEC 60335-2-21);-- appliances intended exclusively for industrial purposes;-- appliances intended to be used in locations where special conditions prevail@ such as the presence of a corrosive or explosive atmosphere (dust@ vapour or gas);-- commercial dispensing appliances and vending machines (IEC 60335-2-75).