Do you know where to find the voltage drop rule in the NEC? That’s a trick question. The NEC has many rules. Some rules are mandatory [90.5(A)] (you must comply), and others are permissive [90.5(B)] ...

The first four chapters of the NEC apply to all installations, except as modified by Chapters 5, 6, 7, and 8. Upon first glance, Chapter 5 [Special Occupancies] may seem overwhelming — especially if ...