I'm reviewing wiring in an area that should have minimal RF emissions.

I was wondering if the AC current carrying wires were to experience high current if that could cause RF emissions of significance. If so would increasing the thickness of the wire help to reduce emissions?

VLF radio is 3 - 30 kHz. AC has 50 and its harmonics, e.g. 100 200 Hz It's low frequency radio, I'd still regard it as RF.