National Electrical Code (NEC)/NFPA 70
The National Electrical Code (NEC, NFPA 70) is the US standard for safe electrical installation — defining wire sizing, overcurrent protection, grounding, and special-occupancy rules that govern every panel and conduit in a battery manufacturing plant. As a hard skill it requires the discipline to look up the relevant article rather than guess, fluency in derating tables for ambient temperature and conduit fill, and awareness of the special articles (Article 480 for storage batteries, Article 706 for ESS, Article 625 for EV charging) directly relevant to battery work. Plant electrical engineers and electricians apply it during every new panel install, every conduit re-route, and every AHJ inspection of a production facility expansion.
