Reply by CaptainKlutz

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Posted on HF dust collector tripping 20Amp dedicated breaker

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2212 posts in 2097 days

#1 posted 12-06-2018 07:31 PM

FWIW – need to learn how to use your new meter:
In order to use the ammeter to check current, you need access to ONE WIRE at time, not the power CABLE.
See, in the power cord you have hot and neutral. AC power flows between them (sort of in/out logic if that helps), and they cancel each other out when you clamp on the cable containing both wires.
Separate the wires in cable, or check the current on single wire near switch/motor and it will work as intended.

-- I'm an engineer not a woodworker, but I can randomly find useful tools and furniture inside a pile of lumber!

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