A collection of 3D points in space that define wire positions in Lineardraft. These can also be referred to as wire registration points - locations where electrified wires are suspended above a rail track.
A wire point for a catenary system typically has two 3D points in space, while a wire point for an auxiliary wire typically has only one 3D point.
Depending on the complexity of the design catalogue you're using, you might find wire points made up of different numbers of 3D points.