How to Select and Choose Hot-Dip Galvanized cable trays - Dexian Metal Products

When cable trays, trunking, and their supports/hangers are used in corrosive environments, they shall be manufactured from corrosion-resistant rigid materials or undergo anti-corrosion treatment. The anti-corrosion method must meet the requirements of the project environment and durability. For locations requiring high corrosion resistance or cleanliness, Aluminum Alloy Cable Trays are recommended.

In sections with fire protection requirements, cable ladders or trays can be modified into closed or semi-closed structures by adding fire-resistant or flame-retardant plates, nets, or similar materials. Additionally, fire-resistant coatings shall be applied to the surface of the trays and their supports/hangers. The overall fire resistance performance must comply with relevant national codes and standards. Aluminum alloy cable trays are not recommended for areas with high fire protection requirements.

Hot-Dip Galvanized Ladder Cable Trays

When installed horizontally, the height from the ground shall generally not be less than 2.5m. For vertical installation, the section below 1.8m from the ground shall be protected by metal covers, except when installed in electrical dedicated rooms.

Cable trays shall be installed horizontally in equipment mezzanines or on main corridors below 2.5m, with protective earthing measures in place.

Non-porous tray-type cable trays shall be selected for cable circuits requiring electromagnetic interference (EMI) shielding or protection against external influences such as outdoor sunlight, oil, corrosive liquids, or flammable dust.

In dust-prone areas, cable trays shall be equipped with covers.

For sections crossing public passages or outdoor roads, base plates should be added to the bottom layer of trays or non-porous trays shall be used.

Cables of different voltages or purposes shall not be laid in the same layer of a cable tray, including:

Cables above 1kV and cables 1kV and below;

Dual-circuit cables supplying Class 1 load in the same route;

Cables for emergency lighting and other lighting systems;

Power, control, and telecommunications cables.

If cables of different voltage levels must be laid in the same cable tray, an intermediate partition shall be installed for isolation.