2023 NEC 705.30(F) and 240.21(C) Overcurrent Protection

Code Corner is an expert-led review and interpretation of codes and standards for industry professionals—10 minutes at a time. In this edition of Code Corner, Ryan Mayfield discusses the 2023 NEC 705.30(F) and 240.21(C) Transformer Overcurrent Protection. NEC 705 is an article about connections of our DG sources, like solar and storage, to utility systems. 705.30 specifically is around transformers and how to integrate and protect them properly. Watch to learn more about primary vs secondary transformers and the proper protection of transformer conductors.