What should always replace a blown fuse?

What should always replace a blown fuse?

• A. A fuse of the same amperage rating
• B. A fuse with higher amperage rating
• C. A resistor
• D. A circuit breaker

Answer: (A)

Fuses protect wiring by interrupting current when it gets too high. When a fuse blows, it has done its job. Replacing it with a fuse of the same amperage rating keeps the exact level of protection the circuit was designed for. Using a higher-rated fuse would allow more current to flow before tripping, which can overheat wiring, damage components, or cause a fire. A resistor isn’t a substitute for a fuse, and a circuit breaker is a different type of protection device rather than a direct replacement for a blown automotive fuse. If a fuse blows, investigate the cause rather than simply increasing the rating.

Fuses protect wiring by interrupting current when it gets too high. When a fuse blows, it has done its job. Replacing it with a fuse of the same amperage rating keeps the exact level of protection the circuit was designed for. Using a higher-rated fuse would allow more current to flow before tripping, which can overheat wiring, damage components, or cause a fire. A resistor isn’t a substitute for a fuse, and a circuit breaker is a different type of protection device rather than a direct replacement for a blown automotive fuse. If a fuse blows, investigate the cause rather than simply increasing the rating.