Please make the not autoconnecting different types of poles a user configurable option.

That seems like a sensible option to have but what's the reasoning behind it? Wouldn't that just lead to your low-power networks being destroyed anytime you accidentally place a high-power pole on a high-power network near them? Or is it so that you can use high-power poles in low-power networks and benefit from the increased range/supply area?

Mostly the latter. I find in my builds that many of the groupings that your mod would apply to depend on or at least benefit from a mixture of pole types. And definitely the range from the large poles and area from the substations, although I mostly only use those on oil fields. For me at least it would be much easier to manually gap areas than to have to manually add copper everywhere I use mixed poles.

Thanks for the feedback, this setting is now released in v1.2.0.