Residential Electrical · Learning Mode
Understand Your Panel
Tap a chip to jump to a concept, or open the panel yourself and click the little i on any breaker to see what it does and why it’s rated the way it is.
Simplified for teaching purposes. Amp values, the trip threshold, and the way loads add up here are illustrative — not a real load calculation, code reference, or spec for any actual panel.
100A Main · 16 Slot · 15 Circuit · 1Ø 3W
Sample Service Panel
For teaching · 100A Main · 120/240V
pull
Inspector
Getting started
Click something to learn about it
This panel is fully interactive. Pull the copper latch to open the door, then click a breaker to flip it,
or click the small i button to read what that circuit does. The chips above will open the door and
point you at a good example of each concept.
Load
0.0 / 100 A
Main Off
Simplified: this just adds up breaker loads. Real panels use load calculations with demand factors, so a 100A service rarely trips this easily in practice.
House Circuits
Panel Safety Basics
- ✓Label circuits accurately — in an emergency, someone needs to know what powers what.
- ✓Call a licensed electrician for repeated trips, panel repairs, or anything past flipping a switch.
- ✕Never swap in a bigger breaker just to stop it from tripping — the wire behind it isn’t rated for more current, and that’s a fire risk.
- ✕Never touch the panel with wet hands or open the dead front cover — parts stay energized even with the main off.