Snap Lines: Use a chalk line or laser level to mark the path on the ceiling or wall. Standard intervals are usually every 1. 5 meters (5 feet), but check the manufacturer's specification for your. This video shows the right technique for marking, cutting, and preparing cable trays used in electrical and mechanical installations. Before starting, ensure you have the correct personal protective equipment (PPE), including gloves, safety glasses, and a hard hat. In case the supports are excessively separated, the tray may end up bending at the center. This is called sagging a tiny bend. What is a cable marker? Simply put, cable markers are symbols or labels used to identify cables, wires, bundles, and conduits.
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