Detail of GB/T 4706.48-2024

Introduction of GB/T 4706.48-2024

GB/T 4706.48-2024 Safety of household and similar electrical appliances - Part 48: Particular requirements for humidifiers 1 Scope This clause of Part 1 is replaced by the following. This document deals with the safety of electric humidifiers for household and similar use, their rated voltage being not more than 250 V for single-phase appliances and 480 V for other appliances. Note 101: Examples of appliances that are within the scope of the standard are ——appliances that atomize water; ——appliances that evaporate water by heating; ——appliances that blow air through a moist element. Appliances that are not intended for normal household use, but that 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. 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 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 relevant national regulatory authorities. Note 103: This standard does not apply to - appliances for heating liquids (IEC 60335-2-15); ——humidifiers intended for use with heating, ventilation or air-conditioning systems (IEC 60335-2-88); ——appliances for medical purposes (IEC 60601); ——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). 2 Normative references This clause of Part 1 is applicable. 3 Terms and definitions This clause of Part 1 is applicable except as follows. 3.1.6 Addition: Note 101: For electrode-type appliances, if no current is assigned to the appliance, the rated current is calculated from the rated voltage and the mean value of the power input during the first 2 min of operation, the appliance being supplied at rated voltage and operated under normal operation. 3.1.9 Replacement: normal operation operation of the appliance under the following conditions The appliance is filled with the maximum quantity of water in accordance with the instructions, unless the appliance is connected to the water mains and the supply is automatically controlled. For electrode-type appliances, the water has a resistivity of approximately 500 Ωcm at a temperature of 20 °C. Note 101: The appropriate resistivity may be obtained by adding sodium chloride to the water. 3.101 electrode-type appliance appliance in which a conductive liquid is heated by a current flowing through it 4 General requirements This clause of Part 1 is applicable.

Contents of GB/T 4706.48-2024