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Evil Genius
Join Date: May 2006
Location: On top of my BBQ
Posts: 5,649
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You def had a floating ground.............voltage needs to be referenced to earth ground or your line neutral.
I'm a EE engineer. shrug.
Most puzzling troubleshooting was at my moms 50 year old house. Lights would dim and or burn out, depending on what appliance was on that circuit. Turned out a tree branch had rubbed through and broke the main power line neutral into the house. So we had a "floating" 220 vac circuit with nothing to reference to.
learned something new that day.
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Wag more, bark less. 
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