I have a MOT that is rated 220V-50Hz only and i need to know its maximum operating power i tried to google the reference number but unable to find anything about its power, so how to figure out the max power?

Edit: so here what I did, I removed the secondary winding of the high voltage and the third of three loops and replaced it with a group of four wires together and made two loops with them, then I measured the main and found ~235 volts then connected the microwave transformer to its board, which is just a filter(A resistor of 1Mohm in parallel, a polyester capacitor of 220nF in parallel, a coil with two inputs two output series) then connected to main the secondary winding showed 1.99 volts then used my clamp meter and short cut the secondary for five seconds each time, the current measured was ~350 amperes.
So law ohm says power is voltage multiplied by the current:
P= 2×350
P= 700
Then to find primary coil current laws ohm says current equal power divided by voltage:
A=700÷235
A=2.98
Now I have three issues to resolve;
1- the inrush current.
2- cable size European norm.
3- the heat generated is transferred to the cable.