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Winn L. Rosch Hardware Bible, Sixth Edition by Winn L. Rosch

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Power Protection

Normal line voltage is often far from the 115-volt alternating current you pay for. It can be a rather inhospitable mixture of aberrations such as spikes and surges mixed with noise, dips, and interruptions. None of these oddities is desirable, and some can be powerful enough to cause errors in your data or damage to your computer. Although you cannot avoid them, you can protect your computer against their ill effects.

Power Line Irregularities

Power line problems can be broadly classed into three basic categories: over-voltage, under-voltage, and noise. Each problem has its own distinct causes and requires a particular kind of protection.

Over-Voltage

The deadliest power-line pollution is over-voltage—lightning-like high potential ...

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