Hi Gary,
Just wanted to thank you for providing me the eBay link to those 1 ohm, 30 amp surge suppression thermistors. I actually opened my breaker box and installed one in series with the 20 amp breaker that feeds my outlet that I run my variacs off of, making sure to provided clearance of the thermistor body from any wiring in the breaker box to allow for the surface heating of the thermistor to ~200 - 220C. Virtually eliminates breaker tripping with variac power ups.
Thanks again,
David
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