I%26#039;ve never heard of it happening, but if the big fuse that supplies the step-down transformer for the area is in poor shape, and you somehow short-circuit your home%26#039;s power line, and the circuit breakers that protect your power line are a bit slow, then yes, you could blow that transformer fuse and black out at least a few of your neighbors. These are a lot of %26#039;if%26#039;s%26#039;, and we try to take them all into account when we design power equipment.
I would have originally answered %26#039;no,%26#039; but a week ago the fuse on our power transformer blew for no apparent reason and blacked out seven houses.|||I would have to agree with 2n2222. It is possible, but not something that would be common. If in doubt as to the possibility, turn off the power coming to the fuse box. If the fuse box is such that there is that kind of concern then you might want to consider other dangers as well, such a fire from a faulty fuse box. Get the box changed for a more current circuit breaker box.|||Yes......if the fuse was wrongly oversized for an existing fault conditon|||Yes.
If for example that %26quot;fuse%26quot; is actually a main bus bar for the house, if you did not turn off all the stuff in the house, when you stick the bar in you create a sudden and large load on the system. For example, the motors of the refrigerator, air conditioners and fans all kick on at the same time and starting a motor is when there is greatest demand. If the system for that block is already maxed out, that extra sudden load can cause a main circuit breaker to cut out for that street.
It is also possible if you have a backup generator. If it is not properly installed, it may continue to run when the main line comes on and if it is not in phase with the power line, it could cause a circuit breaker to open.
But in general I seriously doubt it would happen with just replacing a single fuse in a house.
More in likely whatever caused your fuse to blow in the first place is related to the power failure on the entire street. Instead of the fuse replacement causing the street problem, the street problem caused the blown fuse.
