*Your* health and safety while working on electrical devices, and designing devices that will not shock, set fire to, or otherwise harm the user of the device.
Electrical Engineering can often involve high voltages, high currents, and other aspects that can have decisively negative effects on the health and lives of yourself and others.
Questions can range from the safe use of a part or device (within the scope defined in the help center.), safety protocols in Electrical Engineering, and how to fix a dangerous design.
recommended reading
The Fatal Current
Effects relative to voltage, current, frequency, time of exposure