Strangely, the Antminer comes in a metal case with holes smaller than that. Maybe it wasn't grounded or something? Or it was radiated through the external power

Strangely, the Antminer comes in a metal case with holes smaller than that. Maybe it wasn't grounded or something? Or it was radiated through the external power supply wires? EDIT: mixed them up, Spoondoolies ones had a nice mesh but the Antminer ones don't behind the fans. That 1" of plastic must be enough to let a significant amount through (or the power supply wires still)