As I mentioned in my last entry, we're having a few electrical problems at our house. ComEd is supposed to supply voltage at 120VAC (Volts Alternating Current). That's just a nominal value, it can vary a bit. ANSI standards supposedly permit 5% variation, from 114 volts to 126 volts. ComEd's rule book says they may have 5.8% variation, from 113 volts to 127 volts. This … [Read more...] about VAC, Part 2
Engineering
VAC
Here's a question that's turning out to be harder to answer than I would have thought: What's the acceptable voltage range for your house? A few days ago the lights flickered and the speakers on one of my computers started making funny noises. Turns out they're fried. That computer system wasn't on a UPS, so I went out and bought an APC Back-UPS 800 for it. When I plugged … [Read more...] about VAC