Complex sentence: "National Electrical Code" and "NEC" are registered trademarks of the NFPA and while the NEC is not itself a U.S. law, NEC use is commonly mandated by state or local law, as well as in many jurisdictions outside of the United States.
Split into simpler sentences: National Electrical Code and "NEC" are registered trademarks of the NFPA. While the NEC is not itself a U.S. law, NEC use is commonly mandated by state or local law, as well as in many jurisdictions outside of the United States.