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by janekm 3128 days ago
The "POW" device is one example of a device which has GND at live potential, so should not be connected to anything else while plugged into the mains.

Not that I would recommend plugging any of them into the mains with the case removed, or while plugged into other wiring, to be sure!
1 comments
amelius 3127 days ago
> The "POW" device is one example of a device which has GND at live potential

Is that even allowed by the FCC?

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detaro 3127 days ago
Yes, that's a quite common design. It might be forbidden if you expose that outside the device, but in electronics internal to the device you can do that no problem.
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amelius 3127 days ago
It sounds to me like the ground level is exposed outside the device in this case.
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detaro 3127 days ago
Unless I'm missing something I don't think so. The case has mains voltage in and switched mains voltage out only, to touch the low-voltage bits with the weird ground level you have to crack open the case. Which is kind of encouraged by open design that's easily hackable, but something that falls under "well, if you do that you're supposed to know what you are doing".
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