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Ground or earth is the reference point in an electrical circuit from which other voltages are measured, or is a common return path for electric current, or a direct physical connection to the Earth.

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an external lab supply like this: simulate this circuit – Schematic created using CircuitLab Since the laptop is not gonnected to mains ground (MGND) I would be connecting the floating laptop … ground (LGND) directly to the mains ground (MGND). My question is whether that is okay or do I need to ground the laptop to be sure? …
asked Oct 24 '18 by Mantabit