These challenges include, but are not limited to, wide ranges of temperature, with excessively hot temperatures below the array, direct exposure to UV rays from the sun, direct contact with moisture, collection of debris and vegetation in contact with the wiring methods, and actions of insects, rodents or other animals. The key difference between PV systems and most other electrical systems relate to wiring methods that are installed in harsh environmental conditions and the unique challenges that the installation of these outdoor methods includes. Many of these wiring methods are commonly used throughout the electrical industry and are not new to inspectors. PV systems often include a variety of wiring methods in a single system.
