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ElectraSim lets you build and test domestic wiring directly in your browser. Drop in breakers, sockets and loads from a 115‑component palette, auto‑route cables, then energise the circuit to see current flow, bulbs light and protective devices trip. You can inject faults like open neutrals or earth faults and practise diagnosing them safely. It includes Guided Circuits, Challenge Mode, a Diagnosis Lab and the brutal Ohmageddon mode, all driven by seedable exercises so lecturers can share identical faults with a single code.

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