The NEC contains detailed requirements for calculating service and feeder loads in many types of occupancies. Although most of these requirements are found in Art. 220, other rules affecting service ...

In Part 1, we looked at specific types of commercial loads. Let’s use some examples to show yet another difference in demand factors. If you were to watch daily operations at a marina [555.12], you’d ...

The 2026 National Electrical Code introduces important updates to conductor sizing, load calculations, and safety measures that electrical pros must understand. From adding 16 AWG copper allowances ...