If I have an AC line powering some device, I can put a CT clamp around either the hot or neutral wire, and measure some low ac voltage and current. I understand this is because the AC line creates a magnetic field due to the right hand rule, and I am essentially harvesting the power with a transformer. I have two questions:
Does a CT clamp add more load to the AC line, or is it that the AC line would create that magnetic field no matter what, and I am just harvesting it?
How can I get more total power out of a CT clamp? I am not able to loop the input around multiple times, but would like more power. Will more secondary windings do this? widen the ferrite core? I'm not sure.
Any help appreciated.