The new Class 4 UL classification standard was published in August 2022 in Article 726 of the 2023 National Electrical Code (NEC), specifically for Class 4 cables intended for use with fault-managed power systems. These requirements cover 60-250 °C (140-482 °F), single- and multiple-conductor, jacketed cables for use as fixed wiring within buildings. Class 4 Power, also … Continue reading 2023 NEC Includes Class 4 Certification From UL