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Current Clamps
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I found this article at autospeed.com and thought you might be interested in reading it: 'Current Clamps' - A way of measuring currents that would normally melt your multimeter Most multimeters can measure up to only 10 or - more rarely - 20 amps of current flow. Pump 20 amps through a typical multimeter and you'll get a blown fuse or maybe even a melted multimeter! But in many automotive applications, even 20 amps is too little. However, there are devices available that allow the no-pain measurement of currents up to hundreds of amps like the current flow to the starter motor or a big amplifier. The circuit doesn't need to be broken and the meter won't get hot. It's also safe and easy. And what are these devices called? current clamps. You can read the article at: http://www.autospeed.com/A_2002/cms/article.html
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