posted on Dec, 19 2008 @ 04:22 PM
Most houses in the USA are wired 220v / single phase, so you have 2 wires and the voltages are 180 degrees out of phase- this is how you get 220v.
There is also a neutral wire which if you measure the voltage between either of the 'hot' wires and the neutral you get 110v. If you were to look in
your breaker panel you'd see what I mean. Each hot wire feeds every other breaker kind of like this (the number is one of the hot wires):
1 2
2 1
1 2
2 1
If you need 220 volts for a circuit, you get a dual pole 'ganged' breaker that goes over two terminals and trips both poles simultaneously.
But I digress.... If one leg is interrupted outside of the house, you'll loose power to 1/2 of your breakers. So you could have half your house lit
and the other not depending on how it's wired.
So I'm guessing the utility company was doing some work near your house, possibly doing 1 leg at a time. I say it was probably the utility company
since you say that your neighbors were experiencing the problem as well. Often, the utility company will wire parallel circuits so they can disconnect
something in the middle, but they have to momentarily interrupt the power to change over to the other circuit.
As for the computer and clock, maybe when the utility company cut the power over on whichever leg those were on, the computer shut off (most modern
computers won't turn back on in case of a power failure unless the appropriate setting in the bios is set) but the clock remained on.