Material selection between galvanized steel, aluminum, or fiber-reinforced plastic depends on factors like corrosion resistance, weight limitations, and budget constraints. Proper tray sizing requires calculating fill ratios according to NEC or IEC standards, considering future. Cable tray (or cable ladder) systems are a popular alternative to electrical conduit systems, as they have an outstanding record for dependable service, design flexibility and cost savings in commercial and industrial applications. A properly designed and installed cable tray system will provide. B manufactures its cable tray in a range of materials with a variety of finishes. The selection of material and finish is a function of the environment in wh tant in a wide range of environments, and easily formable (Appendices II and III). 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 transposed to si osure, overheating or. Cable trays play a crucial role in managing and supporting electrical cables in industrial, commercial, and residential applications. The selection of the proper material is essentially an economic consideration.