This solar class is designed to review NEC 2020 standards relative to new installations. It will assist seasoned installers and new tradesman to gain an intricate knowledge of installation requirements, standard techniques. required over-current protection, and required signage. We will review calculations of current requirements, raceway fill, temperature derating of conductors associated specifically with PV installations, and requirements for protection of arrays associated with arc faults and review of troubleshooting techniques.