T/CAS 321-2018 Electrical heating stove safety requirements

Scope

Scope: This standard specifies the terms and definitions, general requirements, classification, marking and instructions, protection against contact with live parts, starting of electrical appliances, input power and current, heat generation, leakage current and electrical strength at operating temperature, transient overvoltage, and moisture resistance for electric heating boilers. This standard applies to electric heating boilers intended for household and similar use, designed to heat water to a temperature below the boiling point. In practical terms, the common hazards associated with the various appliances covered by this standard may be encountered by all individuals in residential and surrounding environments. However, in general, this standard does not consider: - The following groups (including young children): ? Due to physical, sensory, or mental impairments; or ? Due to lack of experience and knowledge, resulting in situations where they cannot safely use the appliances without supervision or guidance; - The situation of children playing with the appliances. Note 1: Pay attention to the following situations: - For appliances intended for use in vehicles, ships, or aircraft, additional requirements may be necessary; - National regulatory authorities may impose additional requirements on appliances; - National authorities have regulations on the installation of equipment connected to water sources. This standard does not apply to: - Liquid heaters (GB4706.19); - Storage-type electric water heaters (GB4706.12); - Instantaneous electric water heaters (GB4706.11); - Indoor heaters (GB4706.23); - The rear heat dissipation system of electric heating boilers; - - Electric heating boilers with a maximum working pressure ≥ 0.1 MPa, an inner diameter ≥ 150 mm, and a water tank capacity ≥ 30 L, where the medium is gas, liquid gas, or a liquid with a maximum working temperature equal to or higher than the standard boiling point; - - Appliances intended for use in spe

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