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With the pole with the vines on it and the vertically orientated lines, I'm thinking 240/415V reticulation.
Would the Phase lines be PVC or XLPE insulated?
Correct on both counts, although if they're older lines they may be the impregnated cloth-type insulation.

The transformer feeding this lot is on the poles you can see to the right in the second picture. It's behind the bushes from this angle, but you can see the 11kV lines crossing the road.

In the distance of that photo is the house you can see in the first pic, and the lines continue around the curve of the road to several more houses. Coming back the other way from the 11kV pole are about another dozen houses on this same xfmr. The 240/415 probably runs about a quarter-mile in each direction overall.

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on the other side of the coin, you'd have to be certifiably crazy to climb a pole carrying live lines anyway!.
But as a lineman you do it all the time! What are you trying to tell us Mike? [Linked Image] [Linked Image] [Linked Image]