Caveat: Unsubstantiated statements follow. There would be some EMF around the wires. While 60 Hz is probably less detrimental, the harmonics (of higher frequencies) are. The effects are subtle and possibly not obvious for healthy people, but can make a difference with autoimmune issues.
Note most of his experiments correspond to radio waves ( WiFi, AM FM etc). But I see no reason to not extend the concept to 50/60Hz and resulting harmonics.
Caveat: Unsubstantiated statements follow. There would be some EMF around the wires. While 60 Hz is probably less detrimental, the harmonics (of higher frequencies) are. The effects are subtle and possibly not obvious for healthy people, but can make a difference with autoimmune issues.