Whether you are an electrical or building inspector, a general contractor, a PV professional or an educator, the fast pace of this evolving industry can either keep you up at night or be the morning jolt you need with (or in lieu of) that first cup of caffeine.
Numerous Code requirements apply to the PV array and other equipment located in the vicinity of the array. These include conductors, DC combiners, arc-fault protection equipment, and rapid shut down equipment. This article addresses some of these requirements as they are found in the 2020 National Electrical Code (NEC).
A PV system is relatively simple in concept, but after the NEC requirements are added for safety, the execution of the system requires considerable attention to detail. There are also significant numbers of electrical inspectors that are new to the field of inspecting PV systems.