In electrical engineering, electromagnetic shielding is the practice of reducing or redirecting the electromagnetic field (EMF) in a space with barriers made of conductive or magnetic materials. It is typically applied to enclosures, for isolating electrical devices from their surroundings, and to cables to isolate wires from the environment through which the cable runs (see Shielded cable). Electromagnet. Materials usedTypical materials used for electromagnetic shielding include thin layer of metal,, metal screen, and. Common sheet metals for shielding include copper, brass, nickel, silver, steel, and tin. Shielding ef. One example is a, which has electromagnetic shielding in the form of a wire mesh surrounding an inner core conductor. The shielding impedes the escape of any signal from the core conductor,.