This mod will automatically string up circuit networks between manually placed long-distance power poles.

For a description of how the mod works and why you would use it, see this mod spotlight for LD AutoCircuit.

In order to reduce instances of accidentally joining local circuit networks with map-wide networks, it will only do this between long-distance power poles, and it will only string a wire between two poles if the already existing power pole is already connected to a wire of that color. Also, it will not do this for bot placed poles.

This behavior can be toggled with a per-player mod config option and a toolbar button, so you can turn it on when you're building a network across the country, and turn it off when you're building locally.

This inspects an entity for wire distance and supply area. In order for it to decide that it's a long-distance power pole, long wire distance and small supply area are required. This means it will work reasonably well with mods that add new kinds of power distribution items.

Planned is adding keyboard commands to toggle the the config option as well as a command to disconnect a pole from all circuit networks, but just circuit networks, not power, sort of like an alternate version of the current shift-click. And perhaps also making this work for ghosts placed by hand.