What issues should be noted when installing cable trays?

With the development of machinery, cable trays are widely used in engineering construction. If we do not understand the issues that need to be paid attention to when installing cable trays, the installation of cable trays will be severely damaged by environmental factors, and the entire circuit will be damaged. Therefore, we need to have an understanding of the issues that need to be paid attention to when installing cable trays, so that we can better utilize them in engineering construction.

We need to understand that the installation of cable trays requires a comprehensive analysis of environmental conditions. Generally, we divide environmental conditions into three types: normal environment, special environment, and corrosive environment. Different environments have different installation requirements for cable trays.

The installation of cable trays should pay attention to determining the direction of the cable tray. The installation of cable trays should be based on the direction of most cables. In outdoor environments, the direction can follow the process pipeline, while in indoor environments, it can follow beams, columns, walls, etc. Then, when installing cable trays, attention should be paid to the calculation of load. The data required for calculation is the weight per unit length of the cable on the cross-section and the total load capacity of the tray.

An important point is that the installation of cable trays requires a comprehensive consideration of the first three conditions to determine the type and specifications of the tray. When selecting, parameters to be considered include the length and spacing of the columns, the level of the tray, and the length of the support arms. When fire prevention requirements are needed in the construction environment, corresponding fire-resistant cable trays can be selected. The overall fire performance requirements of fire-resistant cable trays need to comply with the requirements of national lighting regulations or standards. This is a comprehensive analysis of environmental conditions.

When selecting the load level of a cable tray, the average working load of the tray should not exceed the rated average working load of the selected cable tray. When the actual span of cable tray supports and hangers is not equal to 2m, the average working load should meet the requirements.

After the cable tray is installed, these requirements should be met when connecting the grounding main circuit. The resistance connected at both ends of the cable tray should not exceed 0.00004 ohms, and the grounding hole needs to de energize the insulation layer. When cutting off the power supply, the cross-sectional area in the direction of the cable tray size should not be less than the specified value.

Before choosing a cable tray, we need to pay attention to various aspects of cable tray installation. We need to choose a cable tray that is suitable for the construction environment. If we do not pay attention to the installation of cable trays, it will definitely cause certain losses. So it is important to understand and pay more attention to the issues that need to be noted during the installation of cable trays in practice.