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A 15 Watt Switchable Resistive AC Load
Useful for calibrating an AC wattmeter



This was built in a plastic box -not a good idea because one has to be
very careful not to let the resistors get too hot. A metal box would be
better, but in that case, be sure to ground the box.


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Be sure the switch is rated for the voltage and current to which it will be exposed.
A fuse on the input would be a nice improvement.


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Contents ©2011 Richard Cappels All Rights Reserved. Find updates at www.projects.cappels.org

First posted in June, 2011

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