Uploaded September 2019 | Updated September 2026, 2 weeks ago

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The safety ground is a circuit that ties a conductive chassis to earth in case the chassis becomes electrified, thus protecting the user. If you want to see if this issue effects you (ender or other): power off and unplug the power supply, then probe from the safety ground prong on the AC inlet to see if there is continuity (a few ohms or less) to the metal chassis (remember that there is a coating on it, so probe the bolt standoff as shown in the vid, or the inside of a punch-out where there is no coating).

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