The 30 amp breaker and 10 ga wire to the receptacle will be dedicated to the oven only.
For the oven electronics I plan on using a single 40 amp SSD controlling both 2585 watt elements. I was looking at using the 842 degree wire(8209K17) from McMaster. It's a 14ga wire rated at 55 amps. I guess this is where I get a little confused. Typical 14 ga romex is usually rated at 15 amps while this high temp wire is rated at 55 amps.
Also, this is the wire gauge calculator I have been looking at.
http://www.csgnetwork.com/wiresizecalc.html
If I calculate the total wire run of this setup, it computes that I only need 14 ga wire for the entire run(23 amps, 240 volt, 50 foot maximum length)? Do house wiring circuits always assume a longer distance run, thus the limitations of 15amps/14ga wire, 20amps/12ga wire, etc.