What causes fuses to blow?

Answer

Blowing of the fuse is caused by numerous reasons which are triggered when an appliance draws an excessive current. Some of the prime reasons for excessive current include mismatched loads, overloading, device failure and short circuit. The fuse blows to prevent damage on the appliance that may result from fire or overheating.
Q&A Related to "What causes fuses to blow?"
Fuses are simple devices containing a wire made of a metal that melts at high temperature. When a short circuit occurs, the current through the fuse soars; the higher current means
http://www.ehow.com/info_12199106_causes-microwave...
pullin 2 much juice man or somethings shorted out or isn't completely into the outlet and got in contact with something metal. Source(s) i know stuff.
http://answers.yahoo.com/question/index?qid=200901...
The circuit is shorted. ie. the positive side is directly connected to the negative (ground) If the fuze didn't blow, it would heat up and possibly start a fire.
http://wiki.answers.com/Q/What_causes_tail_light_a...
Fuses That "Blow" Without being able to "hands on" troubleshoot the circuit served by the blowing fuse, no one can identify the specific cause/defect which is
http://wiki.answers.com/Q/What_causes_fuse_in_an_S...
1 Additional Answer
Ask.com Answer for: what causes a fuse to blow
What Causes Fuses to Blow in Cars?
Electric fuses, in any application, are designed to fail when too much amperage runs through them. They are designed as a weak point to protect the rest of a given circuit from damage and fire, to and prevent electric shocks. Fuses blow by heating up and... More »
Difficulty: Easy
Source: www.ehow.com
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