The standards set forth herein apply to the twenty-eighth edition of the Standard for Household Cooking Gas Appliances, Z21.1-2005, and supersede corresponding standards therein. Following their preparation by the supervising Technical Advisory Group, they were accepted by the American National Standards Institute (ANSI) and the Interprovincial Gas Advisory Council (IGAC), and subsequently approved.
1.1.1 This Standard applies to newly produced household cooking gas appliances (see Part IV, Definitions), hereinafter referred to as units or appliances, constructed entirely of new, unused parts and materials. These appliances may be floor supported or built-in.
1.1.2 This Standard applies to household cooking gas appliances:
a. For use with natural gas; b. For use with manufactured gas; c. For use with mixed gas; d. For use with liquefied petroleum gases; e. For use with LP gas-air mixtures; f. For use with either natural, manufactured or mixed gas and convertible for use with liquefied petroleum gases (see Part IV, Defi nitions); g. For manufactured (mobile) home installation for use with liquefied petroleum gases only (see 1.2.25); h. For manufactured (mobile) home installation for use with either natural, manufactured or mixed gas and convertible for use with liquefied petroleum gases (see 1.2.25 and Part IV, Definitions); i. For Recreational Park Trailer installation for use with natural, manufactured, or mixed gases and convertible for use with liquefied petroleum gases (see 1.2.25 and Part IV, Definitions); and j. Provided with pyrolytic self-cleaning oven features or self-cleaning broiler features, or both (see 1.2.26). The construction of floor-supported units and built-in units for use with the abovementioned gases is covered under Part I.
The performance of floor-supported units and built-in units for use with the abovementioned gases is covered under Part II.
1.1.3 This Standard does not cover the thermal efficiency of household cooking gas appliances since it is regulated by the Energy Policy and Conservation Act of 1975, the National Energy Conservation Policy Act of 1978 and the National Appliance Energy Conservation Act of 1987.
1.1.4 This Standard covers electrical equipment, wiring and accessories built-in or supplied for use with an appliance. For appliances which do not have sections which use electrical energy for cooking, it covers only appliances having current limitations of 20 amperes and whose electrical equipment, wiring and accessories are installed in accordance with the National Electrical Code, ANSI/NFPA 70.
This Standard covers (a) appliances which use only gas for cooking and which are designed for connection to nominal 120-volt electrical supplies, or (b) appliances which also use electrical energy for cooking and which are designed for connection to either nominal 120- volt or 240-volt electrical supplies.