DIY Tech Vault · Home Electrical Basics
What’s actually inside your electrical panel
Click or tap any part of the panel below to see what it does, in plain language. It’s the same layout you’ll find behind the door in most North American homes with 120/240V split-phase service.
This is an educational reference, not a substitute for a licensed electrician. Never remove your panel’s cover — the main lugs and bus bars stay energized even when the main breaker is switched off. For any real panel work, hire a licensed electrician and follow your local code.
Panel Directory
Panel layouts vary by manufacturer, service size, and local amendments to the National Electrical Code (NEC) — always confirm details against your own panel’s labeling and a licensed electrician before doing any work. — DIY Tech Vault