UL 62790 PDF

1 Scope

This document describes safety requirements, constructional requirements and tests for junction boxes up to 1 500 V DC for use on photovoltaic modules in accordance with class II of IEC 61140:2016.

This document applies also to enclosures mounted on PV-modules containing electronic circuits for converting, controlling, monitoring or similar operations. Additional requirements concerning the relevant operations are applied under consideration of the environmental conditions of the PV-modules. This document does not apply to the electronic circuits of these devices, for which other IEC standards apply.

NOTE For junction boxes in accordance with classes 0 and III of IEC 61140:2016, in photovoltaic-systems, this document can be used as a guideline.

Summary of Topics

First Edition of the UL IEC-Based Standard for Junction Boxes for Photovoltaic Modules – Safety Requirements and Tests, ANSI/UL 62790, dated May 26, 2023. UL 62790 is an adoption of IEC 62790 (Edition 2.0, issued July 2020). Please note that the National Difference document incorporates all of the U.S. national differences for UL 62790.