EVS-EN 60335-2-21:2021+A1:2021

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.
This document deals with the reasonably foreseeable hazards presented by appliances and machines that are encountered by all persons.
However, in general, it does not take into account:
•  children playing with the appliance;
•  the use of the appliance by very young children;
It is recognized that very vulnerable people may have needs beyond the level addressed in this document.
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).