Hi,
I noticed my Mac Mini only uses a 2 prong plug. I didn't notice a grounded prong.
I remember reading on another forum that this is an intentional design - that somehow the mac mini's power supply and design compensates for not having a grounded plug.
Not being an Electrical Engineer, I thought I'd ask - is this true?
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The power brick convert AC to DC, so you don't need a ground plug with DC.
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It comes down the wattage drawn by the device. Here's bit more: Appliance classes which gets into it a bit. The standard in its self is not available online which gets into the wattage classes.
Here's a bit more on the connectors them selves: IEC 60320
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