UL 399 STANDARD FOR SAFETY Drinking Water Coolers

UL 399 STANDARD FOR SAFETY Drinking Water Coolers 1 Scope 1.1 These requirements cover self-contained drinking-water coolers employing hermetic refrigerantmotor-compressors or thermoelectric water chilling systems and designed for connection to alternating-current circuits rated not greater than 600 volts in accordance with the National Electrical Code,NFPA 70.The following types of water coolers are included within the scope of this Standard: a) Those supplying cold water or both cold and hot water; b)Battery operated; c)Those employing flammable refrigerant as defined in Supplement SB; and d) Those provided with ultraviolet (UV) radiation lamp systems in which the UV wavelengths are200 nm or greater;however, the effectiveness of the water treatment by the UV radiation is notcovered by these requirements. 1.2These requirements do not include additional requirements applicable to equipment designed for usein hazardous locations as defined in the National Electrical Code,NFPA 70. 1.3 A product that contains features, characteristics, components, materials, or systems new or differentfrom those covered by the requirements in this standard, and that involves a risk of fire, electric shock, orinjury to persons shall be evaluated using the appropriate additional component and end-productrequirements as determined necessary to maintain the acceptable level of safety as originally anticipatedby the intent of this standard.A product whose features,characteristics，components，materials,orsystems conflict with specific requirements or provisions of this standard cannot be judged to comply withthis standard. Where considered appropriate, revision of requirements shall be proposed and adopted inconformance with the methods employed for development, revision, and implementation of this standard. 2Units of measurement 2.1 lf a value for measurement is followed by value in other units in parentheses, the second value maybe only approximate.The first stated value is the requirement. 3Undated references 3.1 Any undated reference to a code or standard appearing in the requirements of this standard shall beinterpreted as referring to the latest edition of that code or standard.