What factors should be considered when selecting a cable tray? Factors include the number, diameter, and weight of cables, the tray's load capacity, installation space, environmental factors (e., corrosion, temperature, humidity), and budget. en completely installed, without damage either to conductors or structural system use maintain spacing or to keep cables in place when the tray is ect the minimum bend ra-dius for cables as they exit the bottom of the cable tray. A rung spacing of 6 to 9 inches (150 to 230 mm) is preferable when. Not all cable trays are equivalent. The mechanical and electrical characteristics, tests, certifications, overall quality management, recommendations mentioned in this technical guide only apply to our own cable management ranges and cannot under any circumstances be transpos the enclosure. Always observe common safety practices when assembling tray and fittings. Dust created during fabrication presents no serious health hazard, but skin irritation may be experienced by some workers. Compared to traditional metal trays, GRP Cable Trays offer. A fiberglass cable tray, also called an FRP cable tray or cable bridge in some regions, is a structural support system used to route and protect electrical and instrumentation cables. It is manufactured from fiber reinforced polyester or vinyl ester resin so it has high corrosion resistance, long. Meeting cable tray requirements ensures optimal performance and compliance with safety standards. These requirements outline guidelines for installation, support placement, and material selection.