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Surges and Spikes

In the UK, voltage supplies to premises can vary immensely. While many domestic electrical items can cope with these variations, sensitive computer systems cannot.

When an increase in electricity supply lasts three or more nanoseconds, it is called a surge.

When an increase lasts for one or two nanoseconds, it is called a spike.

A nanosecond is a billionth of a second.

Surge protectors can be used to prevent damage to computer systems. They work by diverting the extra electricity back through the wall socket's earth.