An electrical panel containing fuses that protect circuits from overload by breaking the connection when too much current flows.
From 'fuse' (from Latin fusus, the melted part) combined with 'board,' referring to the flat surface that holds multiple fuses in a building's electrical system.
Before circuit breakers became standard, fuseboard maintenance was a household chore—you'd screw in new fuses like light bulbs, and a blown fuse meant someone was using too much electricity at once.
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