Flexible Mineral-Insulated Fire-Resistant Cable Support Bracket
Category: Blog
Release time: 2023-06-28
Overview: What regulations must flexible mineral-insulated fire-resistant cable support brackets comply with? The brackets shall meet the following requirements: 1. The surface shall be smooth and free of burrs. 2. They shall be durable and stable, suitable for the intended service environment. 3. They shall provide the required load-bearing capacity. 4. They shall satisfy the fire protection requirements of the project. Metal cable supports shall undergo corrosion‑protection treatment and shall comply with the following provisions: 1. For high‑capacity power plants and other locations with dense cable installations, as well as for critical circuits, steel cable trays should be equipped with corrosion‑protection treatments that offer long‑term durability, selecting appropriate corrosion‑protection methods based on the project’s environmental conditions and durability requirements. In highly corrosive environments, it is advisable to use corrosion‑protection treatments with higher durability, such as hot-dip galvanizing.
Flexible Mineral Insulation Fire‑resistant cable What regulations must cable support brackets comply with?
The support shall comply with the following provisions:
1. The surface is smooth and free of burrs.
2. Durable and stable, suitable for the intended environment.
3. Meet the required load-bearing capacity.
4. Complies with engineering fire protection requirements.
Metal cable supports shall be treated with anti-corrosion measures and shall comply with the following provisions:
1. For steel cable trays used in high‑capacity power plants and other densely packed installations, or for critical circuits, the chosen anti‑corrosion treatment should ensure long‑term durability based on the project’s environmental conditions and durability requirements. In highly corrosive environments, it is advisable to employ anti‑corrosion treatments with higher durability, such as hot-dip galvanizing.
2. For copper arm‑type supports, cable trays used in mildly corrosive environments or in non‑critical circuits may be treated with paint.
Except for applications where the single-phase operating current of AC system cables exceeds 1000 A, supports are preferably made of steel. In highly corrosive environments, Select cable supports made from other materials. , shall comply with the following provisions:
1. Ordinary supports (arm-type supports) in cable trenches may be made of corrosion‑resistant rigid materials.
2. Cable trays, ladder racks, and cable trays can be made of fiberglass reinforced plastic that meets the fire‑retardant requirements for the project conditions.
3. When the technical and economic performance is relatively optimal, aluminum alloy cable trays can be used.
The strength of cable supports shall meet the load requirements of the cables and their accessories, as well as the stress demands during installation and maintenance, and shall comply with the following provisions:
1. When temporary pedestrian loads are applied, they may be calculated based on an additional concentrated load of 900 N.
2. During mechanized construction, factors such as longitudinal tensile forces, lateral thrusts, and pulley weights must be taken into account.
3. When outdoors, account for additional loads that may include ice, snow, and strong winds.
4. The structural composition of cable trays shall meet the requirements for strength, rigidity, and stability.
The selection of cable support types shall comply with the following provisions:
1. When the number of cables laid in open trays is large, the cable spans are long, or the cables need to be installed in a serpentine pattern, cable trays are recommended.
2. The bending radius of cable laying shall not be less than 15 times the outer diameter of the cable.
Keywords: Flexible Mineral-Insulated Fire-Resistant Cable Support Bracket
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