What are Lincoln fuses. This expression is quite old. Back in the mists of time, when your grand father was a young man. People used to have fuses that would burn out, but the were expensive. Therefore some people would place a penny inside the fuse box. Guess what, the penny never blows. Your house could burn down from a short, but that penny is going to be around for a long while.
Back then the penny was made from copper. Well, now we have zinc with a thin copper plate. Actually an old copper penny from before 1982 has about a nickles worth of copper in it. If you find an old Lincoln fuse remember to replace it with a real fuse. The Lincoln fuse defeats the purpose of the fuse which is to burn out when there is a short.
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