BackUp Generator
By: Jacob Lyon
A backup generator is a system that is designed to be used as a source of power during a utility outage. When the main power goes down an automatic transfer switch senses the power loss within seconds, and commands the generator to start and then transfers the electrical load to the generator. If the backup generator goes out then depending on how many you have, you would be left without power.
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http://generatorjoe.net/html/stepxstepGenerator.asp
