A good job I asked - that’s totally irregular compared to the standard UK system that we’re used to and the whole Emon system was generally designed for.
I suspected something like that might be the case then I wrote “there might be a problem”. That means you need to use the CM (continuous monitoring) library emonLibCM, and not plain emonLib. I don’t think there’s a “standard” sketch using that, so you’ll have to use one of the examples that come with emonLibCM in the download zip file:
and customise it to use the I/O that you have (Voltage is AIO 0, current inputs 1 - 4 are AIO 1 - 4) and of course you must write the parts to send the outputs that you need.
You can of course (and probably should) leave out everything related to the RFM12B/RFM69CW radios.
As you’re using just one leg of your supply, you want (for accuracy) a 120 V a.c. adapter giving approx 9 V output nominal - expect around 12 V open-circuit) to measure the line voltage, and a single c.t. on the “hot” leg supplying the cooker. You can increase the c.t’s sensitivity by having a multi-turn primary winding (5 turns will make a 100 A c.t. into a 20 A one, for example). That’s better than increasing the value of the burden resistor, which increases the errors as well as the sensitivity. The a.c. adapter is in addition to the Arduino power supply - for which I’m told you should use the 7-12 V input and the on-board regulator in preference to the 5 V input.
If you need more help with calibration, ask again.