I wonder if the electrical engineers used ambient temperature correction factors when designing the electrical system, -80F would let you use substantially smaller conductors.

The NEC allows conductor ampacity to be adjusted 1.2x if the ambient temp is below 50F, but that’s where the table stops, but I’m guessing lower temps would allow for even higher ampacities.

1.2x more ampacity would let you use #12s for a 30A circuit instead of #10s.