Tesla Inc (TSLA)

[boston745]

If we were trying to shield the magnetic fields from a 60 Hz transformer, a 3 mm thickness of copper or aluminium could only achieve about -3 dB, but 3 mm of this grade of mild steel could achieve about -18 dB. (There is more to the effective shielding of power-frequency magnetic fields than this, such as the avoidance of magnetic saturation, but this is outside the scope of this article.)

Look at how much better steel is able to attenuate than copper & aluminum at 3mm thickness the cybertruck exoskeleton will be.

All conductors always shield electric, magnetic and EM waves/fields, even if they are used as power, signal or data cables or PCB traces, PCB ground or power planes, or non-electrical brackets, support structures, fixings, etc., etc.

In just the same way, all conductors (wires, cables, PCB traces, brackets, PCB planes, conductive liquids, etc.) still behave as inductors, mismatched transmission lines, and “accidental antennas,” even if we call them “ground” and cover them with green insulation (even if it is green with a yellow stripe!).

All conductors absorb EM energy like cybertrucks exoskeleton. Likely why Teslas have such EMI issues. All those wires and pcbs absorb that EM energy.