NFPA, 2019. Item #25871
From the NFPA:
The 2019 California Electrical Code, California Code of Regulations Title 24, Part 3 is based on the 2017 edition of NFPA 70®: National Electrical Code (NEC) -- the widely adopted Code containing regulations for electrical wiring, overcurrent protection, grounding, and installation. Updated every three years to incorporate California amendments, the purpose of the California Electrical Code is the practical safeguarding of persons and property from hazards arising from the use of electricity.
In addition to new and revised articles addressing renewable energy, the California Electrical Code enhances personnel protection with expanded GFCI protection, new requirements to protect electrical workers while maintaining or servicing electrical or electrically powered equipment, and alternative methods for performing load calculations.