Q:

How do I fix a blown fuse?

A:

To replace a blown fuse, unplug the appliance that is the cause of the problem, locate the blown fuse, unscrew the fuse, and replace it with an exact match. When working with a fuse box, it is essential to have dry hands and stand on a dry surface.

Fuses blow because the circuit is overloaded, there is a ground fault or there is a short circuit. Without fixing the underlying cause of the blown fuse, it blows again. As the number of electrical appliances operating in the average home today may be greater than was common at the time of the home's construction, many circuits are overloaded. The solution is finding another circuit to power the appliance or updating the wiring to meet current needs.

One method of determining the cause of the blown fuse is unplugging all the appliances from the circuit and turning off the lights before replacing the fuse. If the fuse blows with no appliances or lights, the problem is in the wiring. The next step is turning on the lights one at a time to determine if a light is the problem. If the lights are not the problem, the final step is plugging in each appliance individually to determine the one causing trouble. When the problem-causing appliance is identified, it should be removed from service, then replaced or repaired.

Learn More

Related Questions

  • Q:

    How does a short circuit occur?

    A:

    The main cause of a short circuit is when two bare wires touch each other. This causes extra current to flow through the circuit, which can be dangerous. Two bare wires typically come into contact with each other when the insulation around the wires deteriorates.

    Full Answer >
    Filed Under:
  • Q:

    What is a three-phase electrical wiring diagram?

    A:

    A three-phase electrical wiring diagram is a clear, visual representation of a common method of power generation and distribution. Three-phase electrical wiring is the most common means of distributing alternating-current power on power grids world-wide.

    Full Answer >
    Filed Under:
  • Q:

    How do you set the timer on a Malibu lighting transformer?

    A:

    To set the timer on a Malibu Lighting transformer, users should first turn the dial until the arrow lines up with the correct current time, then set the green tripper at the time they want the lights to turn on and the red tripper to the time they want the lights to turn off. They can then rotate the manual override wheel to turn the lights on if the current time is within the "on" interval of the green and red trippers. The timer does not take into account daylight savings time, so the timer may need to be readjusted twice a year.

    Full Answer >
    Filed Under:
  • Q:

    What are UM3 batteries?

    A:

    UM3 batteries are standard AA batteries, which are produced across multiple battery types. The most common types of AA battery are alkaline, NiMH and lithium. UM3 is the JIS name for AA batteries.

    Full Answer >
    Filed Under:

Explore