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Like a circuit breaker, a fuse interrupts current when the circuit experiences overload. It is important to match the fuse's capacity with the current-carrying capacity of the branch circuit. Fuses come in different amperage (such as 15, 20, or 30 amp's). Any size fuse will fit in the fuse panel box, but they are not all alike in their electrical capacity. This means that replacing a 15 amp fuse with a 30-amp fuse will leave the electrical system in danger of overload. The 30-amp fuse will not blow, but the wires will become too hot and possibly cause a fire. This dangerous situation can occur when a resident gets tired of replacing fuses and ups the amperage until the fuse no longer blows when overloaded. As a precaution, a permanent adapter (Fustat) that does not accept a fuse that is not the right amperage for the plug is available.