UL 3730:2021 pdf download.STANDARD FOR SAFETY-Photovoltaic Junction Boxes.
1.1 These requirements cover photovoltaic junction boxes intended to be attached to photovoltaic modules and panels.
1.2 These requirements cover photovoltaic junction boxes intended for factory and field wiring and may include conduit openings, wiring leads, and/or photovoltaic connectors intended for interconnection of PV modules.
1.3 The products covered by these requirements are intended to be installed in accordance with the National Electrical Code, ANSI/NFPA 70.
2 General
2.1 Components
2.1.1 Except as indicated in 2.1.2, a component of a product covered by this stanaard snail comply with the requirements for that component. See Appendix A for a list of standards covering components generally used in the products covered by this standard.
2.1.2 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b) Is superseded by a requirement in this standard.
2.1.3 A component shall be used in accordance with its rating established for the intended conditions of use.
2.1.4 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.
2.2 Units of measurement
2.2.1 Values stated without parentheses are the requirement. Values in parentheses are explanatory or approximate information.
2.3 References
2.3.1 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.
3 Glossary
3.1 In the text of this standard, the term “unit” refers to any product covered by this standard. For the purpose of this standard, the definitions in 3.2— 3.18 apply.
3.2 AC MODULE — The smallest complete unit that includes solar cells, optics, inverters, and other components, excluding tracking devices, intended to generate ac power from sunlight.UL 3730 pdf download.