Indeed, larger temperatures improve resistance, so you might have to implement a larger wire size in hot environments. That’s why wire sizing is particularly critical in DC devices — they run at very low voltages, so even a little drop can drastically impression general performance. Identical to h2o in https://pv-cable-near-me17161.jasperwiki.com/7373069/twin_core_vs_single_core_choosing_the_right_cable_for_dc_solar_arrays