HF leakage, earthing and interference: where RF goes when it does not go home

Interpret HF leakage results in the context of IEC 60601-2-2, explain capacitive coupling and use it to reason about stray current and interference, troubleshoot interference with monitors and endoscopy video step by step, and recognise a mains earthing fault in the operating room and what a voltage on another device's enclosure means.