Tag:line_attachment=pulley

line_attachment = 
Description
A line supported by a wheel designed to allow longitudinal moves and hold it at a proper distance of a fixed support. Show/edit corresponding data item.
Group: infrastructure
Used on these elements
may be used on nodesshould not be used on waysshould not be used on areasshould not be used on relations (except multipolygon relations)
Useful combination
Status: approvedPage for proposal
More details at taginfo
Tools for this tag

Usage

A pulley support is different from a suspension or anchor attachment. With an appropriate mechanical tension, the line/cable is hold by a vertical accessory and maintained at a proper distance of the support without any clamp to fit them. The cable can move and the support is designed to follow it with a moving part (mandatory). The usual groove wheel for such pulleys can be replaced by an appropriate insulator in case of bare power conductors. A pulley on which the line is terminating is an actual anchor and shouldn't be confused with this value.

Examples

Misc

Photo Location Tagging Note3
France

support=pole
line_attachment=
material=concrete

Cables are designed to move along supporting pulleys (you can see the lubricant around them) to remotely actuate railway switches near of a station.
Lack of free illustration
See [1]		 --

Unknown tagging for such a support, power=pole sounds overkill for electric fences.
line_attachment=
material=wood

Wood post insulators supports live wires of electric fences. This support is designed to allow movement of the live wire. This is an actual pulley and not a suspension one.
Germany


line_attachment=
material=metal

Chains are hold by pulleys to redirect orthogonal effort
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