UL 1012-2021 pdf free download.Power Units Other Than Class 2.
2.1 Except as indicated in 2.2, a component of a product covered by this standard shall comply with the requirements for that component. See Appendix A for a list of Standards covering components used in the products covered by this Standard.
2.2 A component is not required to comply with a specific requirement that:
a) Involves a feature or characteristic not required in the application of the component in the product covered by this standard, or
b) Is superseded by a requirement in this standard.
2.3 A component shall be used in accordance with its rating established for the intended conditions of use.
2.4 Specific components are incomplete In construction features or restricted in performance capabilities. Such components are intended for use only under limited conditions, such as certain temperatures not exceeding specified limits, and shall be used only under those specific conditions.
3 Units of Measurement
3.1 Values stated without parentheses are the requirement. Values in parentheses are explanatory or
approximate information.
4 Terminology
4.1 Unless otherwise stated, values of current and voltage are root-mean-square (rms).
4.2 The term “product as used in these requirements refers to all power units or any part thereof
covered by these requirements unless specifically noted otherwise.
4.3 The term power unit” as used in these requirements refers to all power supplies, battery chargers,
and transformers covered by these requirements.
5 Undated References
5.1 Any undated reference to a code or standard appearing in the requirements of this standard shall be interpreted as referring to the latest edition of that code or standard.
6 Glossary
6.1 For the purpose of this standard the following definitions apply.
6.2 BATTERY, SEALED — A battery that has no provision for the addition of water or electrolyte or for external measurement of electrolyte specific gravity.UL 1012 pdf download.