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electric arc
(redirected from Electrical arcs)

    Also found in: Wikipedia 0.03 sec.

electric arc

A continuous electric discharge of high current between two electrodes, giving out a brilliant light and heat. The phenomenon is exploited in the carbon-arc lamp, once widely used in film projectors. In the electric-arc furnace an arc struck between very large carbon electrodes and the metal charge provides the heating. In arc welding an electric arc provides the heat to fuse the metal. The discharges in low-pressure gases, as in neon and sodium lights, can also be broadly considered as electric arcs.
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The long and extremely thin metal guidewires used in advanced interventional surgical procedures can generate electrical arcs and extreme localized heating under certain MRI imaging conditions, potentially harming both the patient and the surgeon.
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Flame resistant fibres and fabrics are used in the manufacture of industrial workwear, firefighters' apparel and professional motor racing apparel to protect the wearer against fires, electrical arcs and molten metal splashes.
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Electrical arcs can cause damage that often remains undetected until after the fabrication process, which involves literally hundreds of steps, is completed.
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