A heating element is used to convert electricity into heat.Within a furnace, especially industrial furnaces, there are various materials that can be used.Iron-Chrome, aluminum or nickel chrome alloys are used in furnaces, the standard shapes are cylindrical, semi-circular or even flat panels. Metalic Heating elements can heat up very fats and the top heat this element can reach is up to 1425 degrees Celcius. If the heating element heats up more than this, it usually burns out or fails. It heats up more than it should when the flow of electricity is resisted by the electric current and metal conductor.
A heating element doesn't work in isolation: you have to consider how it will fit into a bigger appliance and how it will behave during use (when it's used, or abused, in different ways).Resistance is the basic electrical principle that explains how heating elements work. Electricity is the flow of electrically charged particles (known as current) through a conductive material, in this case electrons through metal wires. In a typical household electrical system, there are two "hot" wires, each with 120V to ground. One is 180 degrees out of phase with the other, so there is 240V between the "hot" wires - your heating element is connected across these. So no point on the element would have more than 120V to ground on it.