Electrical Intermediate
NEC code deep-dive, service entrances, open-neutral diagnostics, workflow — 4 lessons with case studies.
Start Lesson 014 lessons in order
NEC Code Deep Dive — Branch Circuits & Box Fill
The NEC is the rulebook. Inspectors don't fail electricians who break rules — they fail electricians who don't KNOW the rules. This lesson covers branch circuit calculations, box fill, and the violations that come up in 80% of failed inspections.
Service Entrances & Panel Upgrades
Panel upgrades are where the money is. This lesson covers service calculation, service-entrance components, grounding/bonding (the most-failed inspection area), and the customer conversation that turns a $1,200 quote into a $3,500 approval.
Troubleshooting: Open Neutrals, Shared Grounds, & Mystery Faults
Troubleshooting separates electricians from box-stuffers. This lesson covers the systematic approach to open neutrals (the most dangerous fault in residential), shared-ground problems, intermittent faults, and the meter techniques that find what others can't.
Residential Wiring Workflow & Customer Trust
Most electricians are technically competent. The ones who build $500K/year businesses also understand workflow, pricing, and the customer experience. This lesson covers job flow, communication, and the small touches that win referrals.