Specifications for Polymer Cable Tray Supports

Polymer cable tray supports offer high corrosion resistance, lightweight construction, and mechanical strength suitable for industrial and commercial cable management applications.Material and ConstructionPolymer cable trays are typically manufactured using pultruded polyester resin or vinyl ester composites, providing a high strength-to-weight ratio and excellent resistance to corrosion, chemicals, and moisture . Unlike steel or aluminum trays, polymer trays do not require galvanization or additional coatings, making them ideal for marine, chemical, or highly corrosive environments . They are also non-conductive, which can reduce grounding requirements in certain installations.Mechanical Strength and Load CapacityPolymer trays are designed to withstand mechanical loads comparable to steel trays, with specifications depending on tray width, depth, and span length . Load ratings are typically tested according to IEC 61537, ensuring trays can support the weight of cables without excessive deflection. Support spacing is critical; standard spans range from 1.5 to 3 meters, depending on tray size and load requirements .Environmental and Thermal ConsiderationsPolymer trays exhibit excellent resistance to UV radiation, moisture, and chemical exposure, making them suitable for both indoor and outdoor installations . They also accommodate thermal expansion and contraction, which must be considered in long runs to prevent warping or stress on supports . Operating temperature ranges are generally lower than steel, so high-temperature applications may require specialized polymer formulations.Compliance and StandardsPolymer cable trays must comply with IEC 61537, which specifies requirements for mechanical strength, corrosion resistance, fire performance, and installation compatibility . CE marking or equivalent certification ensures compliance with European directives, while UL or NEMA standards may apply in North America . Proper documentation and testing are essential for safety and long-term reliability.Installation GuidelinesSupport spacing: Follow manufacturer recommendations based on tray width, load, and environmental conditions .Mounting: Use compatible polymer or stainless steel brackets and fasteners to prevent galvanic corrosion .Cable securing: Rungs or perforations allow for cable ties or clamps to maintain cable position and prevent sagging .Expansion joints: Include expansion allowances for long runs to accommodate thermal movement .Advantages of Polymer SupportsLightweight and easy to handleHigh corrosion and chemical resistanceNon-conductive, reducing electrical hazardsSuitable for harsh environments where metal trays may degrade Polymer cable tray supports are a reliable choice for industrial, commercial, and corrosive environments, offering durability, compliance with international standards, and flexibility in installation. Proper design, load calculation, and adherence to manufacturer specifications are essential for safe and efficient cable management .