If it is getting hot while under test, I suggest you remove the kindling and rags from under it. Get a piece of ceramic time or a clay pot for it.I connected a light bulb to the circuit. I tried to wire it in any possible way but the light has the same brightness.
I still cant measure ac current ( i have to buy a good enough meter ).
There is one thing i noticed.
My primary coil is at the bottom and the extension is sitting on the top.
Connecting L and N either pushes the coil up or pulls it down depending on how i connect them together. That would be the magnetic flux i assume. Is there a right and wrong way of connecting it? Does the flux has to flow in one direction or it doesn't matter at all?!
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