Electricians use these electrical testers every day to see if a circuit or device is energized. They are crucial safety tools that keep electricians out of harms way and tell them if there is trouble on a circuit or device. There are several different types of testers on the market, some with specific purposes only and some with multiple testing features. Here are the top 6 electrical testers used by professional electricians.
...Source: http://electrical.about.com/b/2013/03/17/top-6-electrical-testers.htm
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