This clause of Part 1 is replaced by the following. This International Standard deals with the safety of electric storage 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. Appliances not intended for normal household use but which nevertheless may be a source of danger to the public@ such as appliances intended to be used by laymen in shops@ in light industry and on farms@ are within the scope of this standard. This standard is also applicable to immersion heater units intended to be retrofitted in a heat exchange closed water heater having provision for retrofitting. Such a unit shall comply with the requirements in Annex AA. NOTE Australia@ Netherlands and New Zealand do not allow immersion heater units intended to be retrofitted in a heat exchange closed water heater unless: -the immersion heater unit has been tested with the tank models and brands listed in the instructions of the immersion heater unit; -the tank models and brands list the models of the immersion heater units that can be retrofitted. As far as is practicable@ this standard deals with the common hazards presented by appliances that are encountered by all persons in and around the home. However@ in general@ it does not take into account -persons (including children) whose ? physical@ sensory or mental capabilities@ or ? lack of experience and knowledge prevents them from using the appliance safely without supervision or instruction; -children playing with the appliance. NOTE 101 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 102 This standard does not apply to -appliances for boiling water (IEC 60335-2-15); -instantaneous water heaters (IEC 60335-2-35); -commercial dispensing appliances and vending machines (IEC 60335-2-75); -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).