As shown in the image below, the USB port's metal enclosure is touching the copper clad of the PCB (which is a ground plane).

Can Bad Things Happen™ if the port's enclosure is grounded?

I beep-tested the 4 pins with the enclosure, and none of them are connected to it. However, could some shorts be made when plugging something into the port?


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    \$\begingroup\$ It should be grounded. However, which ground it should be connected to (chassis/safety/signal/power) could be a different matter. \$\endgroup\$ – Someone Somewhere Nov 30 '18 at 4:54
  • \$\begingroup\$ @SomeoneSomewhere -- Thanks for the comment! We only have one ground in our design (both our signals and power share the ground plane). Would it have to be a different ground? \$\endgroup\$ – Fine Man Nov 30 '18 at 5:08
  • \$\begingroup\$ @SomeoneSomewhere -- I presume we'd need a chassis ground. Since its the only thing in our project that could be considered a "chassis", would we still need one? \$\endgroup\$ – Fine Man Nov 30 '18 at 5:13
  • \$\begingroup\$ It depends on what kind of product we're dealing with. \$\endgroup\$ – Someone Somewhere Nov 30 '18 at 5:31
  • \$\begingroup\$ Regarding shielding/grounding, see here: electronics.stackexchange.com/a/408044/117785 \$\endgroup\$ – Ale..chenski Nov 30 '18 at 5:37

Assuming that there are not more than one GND then yes it is recommended to Ground the USB port enclosure.

For more information please look at this thread. USB Shield. To ground or not to ground?


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