The electricity that comes to our homes is still every similar to that of 50 years ago, however the machinery which consumes those currents have become increasingly more delicate and sensitive. An electrical surge is when the voltage increases above the norm for at least 3 nanoseconds. This heats up the wire and can ultimately burn it, or in some cases set it on fire. Any digital hardware connected when a surge occurs could potentially be burnt out or all the data wiped. There are a variety of options on the market, make sure that you buy the one that is best for your needs. Not all the surge protectors are the same and some of them might even be powerstrips disguised as surge protectors. Some even come with warranties of $300,000 on equipment.