Reply by Tennessee

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Posted on GFIC outlet and my Performax 10-20 won't play together.

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2870 posts in 2507 days

#1 posted 08-13-2012 12:34 AM

Remember that a GFCI is intended to pop when it senses any voltage going to ground. This also has to have a small amount of amperage with it, so the sensor can trip. Doesn’t take much at all, milliamps.
Also remember that the original use of GFCI is to prevent shock around water, so if water can carry the current with 120VAC, you will pop. People always think of a lighting bolt running through water, lighting is usually over 30,000 VDC. WAY more then a little 120VAC. So you have an amperage bleed somewhere in your sander, maybe even in the plug and wire.
All that being said, you may have a slight ground in multiple places in your sander, not just the switch. Any place where you might have dust from wood with any kind of dampness or minerals that would allow the windings to ground, the switch, any screw connection, the whole circuit!

-- Tsunami Guitars and Custom Woodworking, Cleveland, TN

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