I'm updating an old thread but I started it so there
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My latest indoor layout has a 90 degree crossing. I wanted to add overhead lines to the layout but pondered a bit about how to handle the crossing. This is what I came up with. You need some LGB catenary clips (#56204) or alternatively the isolating clips (#56203). The same approach would work with with any angle crossing. Here's a picture:
More detailed view:
Finally some videos of it in operation. The first two are very short showing a loco crossing each way, and the third is a slightly longer view.