CORDELIA MOLLOY / SCIENCE PHOTO LIBRARY CORDELIA MOLLOY / SCIENCE PHOTO LIBRARY
Electrical fuse. Three-amp (short for ampere) fuse that is designed to protect electrical devices and people from excessive amounts of electricity. When the fuse is connected in an electrical circuit, an electrical overload will melt the thin wire in the fuse, cutting off the electrical supply. The unit of electrical current is the ampere (A).
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