What are fuses? What are their needs? Are they to be wired in a series circuit or a parallel circuit?

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Fuse (electrical) - Wikipedia, the free encyclopedia (http://en.wikipedia.org/wiki/Fuse_%28electrical%29)

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What are fuses? What are their needs? Are they to be wired in a series circuit or a parallel circuit?

Thank you for your attention
Fuses are protection devices for specific circuits. They need NOT to be exceeded as far as amperage goes. They are wired in series and parallel circuits.