Thanks for keeping me honest Dr. Kitz. Although I might argue that current draw in an automobile does have a high frequency component particularly related to the ignition system which will be comprised of a fundamental and harmonics of say 800Hz for an 8 cylinder engine at 6000rpm. I think for these components of the electrical load, the skin depth will be on the order of <100um given copper conductivity of about 17 nOhm*m and permeability of about 1.3 uN/A^2. I'm probably missing something here and I certainly don't intend to impugn your judgement and must defer to your doctorate compared to my lowly BSEE (emphasis on BS )...

Am I thinking about this incorrectly?

Thanks,

Chris