Mains electrical cables contain a metal wire, covered in plastic insulation. This ensures you cannot touch the bare wires which could cause a dangerous electric shock. The case of the plug is ...

Electrical panels may be a necessity in case of power outages, blown fuses, or short circuits, but if yours is located anywhere aside from the garage or utility room, its gray metal box can look ...

Without the earth wire, if a fault occurs and the live wire becomes loose, there is a danger that it will touch the metal case ... a built-in fail-safe to the electrical circuit for a device.