Posted by **Bethan** on Thursday, September 28, 2006 at 1:37pm.

What are fuses and why do they come in different sizes?

Fuses are devices placed in electrical circuits as protection for those circuits. They consist of small pieces of wire, sometime as ribbons, and are placed in series with the circuit so that the current passing through the device must pass through the fuse. A device that draws, say 1 ampere of electrical current may have a 2 ampere fuse in it. The device works ok unless and until something happens that causes more than 2 amperes to flow through the circuit. At that point, the fuse literally melts, stops conducting the electrical current, and the system shuts down. But suppose we have a device that uses 8 amperes. Then we must use a larger fuse; i.e., a 2 ampere fuse would be no good because it would not allow the device to operate. An air conditioner may use 20 amperes so we would put a slightly larger fuse to operate that. That in a nutshell is why fuses come in different sizes; i.e., we pick a size that fits the job we want to do.

## Answer This Question

## Related Questions

- electric circuit - Some types of fuses used to protect electric meters have ...
- Electrical - A device is rated to operate at a voltage of 24V. It has a ...
- algbra - If fuses cost $2.35 each, and each motor requires 3 fuses, how many ...
- Finite Math - A factory produces fuses, which are packaged in boxes of 26. Eight...
- Math - A factory produces fuses, which are packaged in boxes of 16. Three fuses ...
- math-probability - A factory produces fuses, which are packaged in boxes of 17. ...
- science - what is the importance of fuses? They are placed in electrical ...
- maths - a box contains 20 fuses ,out of which ,5 are defective.if a sample of 3 ...
- Science - What is the rule for combining resistors in series and parallel ...
- science - how does an electric ciircuit work? Books have been written about ...

More Related Questions