I have to asked a dumb question. Non resistance wire must have resistance to heat up or what am I missing here. I missed all the fun and started vaping when that was going out of style.
Basically there is no such thing as non resistance wire. Nickel NI200 is used because it has a very constant ohm increase as it heats. So you start with a reading of the ohms at room temp and as it heats the ohms rise, this measured ohm rise is then controlled to maintain a peak F temp.