![]() ![]() Heating occurs mainly by conduction that is, the direct contact of the heating element to the cookware. On higher settings, the element glows red when operating. Usually these are nichrome wire, surrounded in ceramic insulation, with a steel sheath around the ceramic. In most cooktops, the heating element is simply a big resistor wire, with enough resistance to generate a high heat. Also, in some fixed-temperature switch applications, 110 volts is applied to a 220 volt surface unit (burner) to achieve a "low" heat setting. Some smaller "apartment" cooktops run on 110 volts. ![]() The heating elements usually run on 220 volts, and accessories such as lights, timers and rotisserie motors run on 110 volts. Most electric cooking equipment uses two different electrical circuits.
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