what is safe current in physics?
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One safety feature is the label on a lamp that warns the user of the maximum safe wattage for light bulbs. Another safety feature is double insulation on many electric devices. Not only are the electric wires insulated with a coating of plastic but so is the entire device. The old toaster pictured in the Figure above lacks this safety feature, but most modern toasters have a plastic casing. This reduces the risk of current leaving the device except through the cord.
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