Long time ago the Heavy conductive wire had twice max load than regular heavy wire. I miss that so much and don't know it is a bug or it meant to be like this. I've tested mods that increase this max load for heavy conductive wire but none of them work. So now I'm using ONI-Modloader https://github.com/javisar/ONI-Modloader with NoDamage https://github.com/javisar/ONI-Modloader-Mods/tree/master/Mods/NoDamage set to turn of overload damages only. As far as I know, these mods do not touch save files, only change game behavior.
When the case of heavy conductive wire will be clear then I want to get rid of this mod and... maybe rebuild my power supply in the base. No matter, it's not the point.
I saw few other simillar bugs with crash to desktop posted here, so I hope they will help to figure it out better.