Electrical professionals have long observed the “underloading” of customer-owned transformers, which, in part, is brought about by National Electrical Code (NEC) Chapter 2 design demand rules. This ...

Based on the 2020 National Electrical Code. Article 220 of the 2020 National Electrical Code (NEC) contains the requirements for calculating demand loads for branch circuits, feeders, and services.

Members of the National Fire Protection Association (NFPA) recently concluded discussions on updating Article 220.12 of the NEC (National Electrical Code) to align with a series of energy codes, as ...