Can ladder-type cable trays be used for instruments? What are the pros and cons?

Ladder-type cable trays can accommodate various types of cables within a single tray, but they are expensive. For trough-type trays, strong and weak cables must be separated. Specifically: 1. Ladder and tray cable trays of the GJD(T, P) type can be widely used in industries such as petroleum, chemicals, electricity, light industry, television, telecommunications, and coal for laying cables. They feature an attractive design, simple structure, and easy installation (with good heat dissipation and air circulation). The stepped cable tray meets the requirements for power cables, and it is also suitable for laying control cables. Power cables and control cables can be laid in the same cable tray after the use of partitions. The surface treatment methods for ladder-type and tray cable trays include electrostatic spraying, galvanizing, hot-dip galvanizing, and spraying after galvanizing; these methods can be used in different environments. In highly corrosive environments, special anti-corrosion treatments are required. 2. Trunking cable trays: Trunking cable trays are fully enclosed types of cable trays, and they are most suitable for laying computer cables, communication cables, thermocouple cables, as well as control cables for other highly sensitive systems. It provides good protection against shielding interference in control cables as well as against cable damage in highly corrosive environments. The surface treatment options for trough cable trays include electrostatic spraying, galvanizing, hot-dip galvanizing, and spraying after galvanizing; these can be used in different environments. In highly corrosive environments, special anti-corrosion treatments are required. 3. Modular cable trays – Modular cable trays represent the latest type of cable tray, being a newer version within the cable tray series. It is suitable for the installation of various projects, different units, and various types of cables. It features a simple structure, flexible configuration, easy installation, and a modern design. Assembled cable trays can be constructed to the desired size using three basic widths of 100, 150, and 200. Without the need for accessories such as elbows or tees, they can be adjusted in direction, widened, branched, or led upward or downward according to the requirements on site. At any location, it can be led out using tubes without the need for drilling or welding. It facilitates both engineering design and production and transportation, and further simplifies installation and construction; it is the most ideal product among cable bridges at present. The modular cable trays are equipped with covers, and their surface treatments include electrostatic spraying, galvanizing, hot-dip galvanizing, and spraying after galvanizing – these options can be used in different environments; special anti-corrosion treatment is required in highly corrosive environments. 4. Long-span cable trays: Long-span cable trays are types of cable trays that have a greater support span compared to ordinary cable trays. Thanks to their carefully designed structure, they also possess a higher load-bearing capacity than regular cable trays. Therefore, it is not only suitable for the overhead installation of cables in indoor and outdoor areas of industrial and mining enterprises such as those in the oil refining, chemical, textile, machinery, metallurgy, power, television, and broadcasting sectors, but it can also be used as supports in underground structures such as cable trenches and cable tunnels in subways and civil defense projects. Large-span cable trays include large-span ladder types, trays, trough types, heavy-duty ladder types, as well as corresponding connectors; covers are available. If covers are required, this should be specified at the time of ordering. The height options are 60 mm, 100 mm, and 150 mm, while the length options are 4 meters, 6 meters, and 8 meters. Customers can determine these parameters according to their project needs and must specify the type, height, width, and length in the contract. The surface treatment for long-span cable trays includes plastic spraying, galvanizing, painting, etc. In highly corrosive environments, galvanizing followed by spraying can be used.

2# devil_ytw: As mentioned on the second floor, ladder-type cable trays meet the requirements for power cables; they can also be used for laying control cables. It is also possible to lay power cables and control cables in the same cable tray layer after using partitions. ” What kind of partition does a partition refer to? Are there any pictures? Everything below is empty. Is it useful to add partitions?

Our factory uses trough-type cable trays, which have a steel plate lining with glass fiber reinforced plastic on the outside, and are completely enclosed

The main function of trough-type cable trays is shielding, with a certain degree of isolation from hazardous gases as a secondary benefit

Personal opinion: 1. There are no strict regulations requiring that low-voltage cables must be used in tray-type cable trays. 2. It becomes much easier to make a decision after distinguishing the advantages and disadvantages of trough-type and ladder-type cable trays. a. The shielding effect of the slot type is better than that of the ladder type. b. The protective effect of the slot type is superior to that of the ladder type. c. The ladder type is generally used for control cables and power cables, and its load-bearing requirements are higher than those of the slot type. d. Ladder type is generally used for control cables and power cables to facilitate heat dissipation. e. The ladder-type has higher strength than the groove-type, allowing it to be made larger and longer. The above is for reference only

Is the ladder type good? Isn’t it exposed below? Over time, the cables will age.

Are all the ladder-type ones exposed? In that case, they’re not as good as the slot-type ones

Ladder-type cable trays offer less protection; nowadays, there is hardly any high-voltage electricity in chemical plants, with most systems operating at 24 volts, so ladder-type trays are also sufficient

T-type cable trays offer good heat dissipation, but their protection is inferior to that of enclosed cable trays. Enclosed cable trays have poor heat dissipation, but offer better protection than T-type trays. Power cables are mostly high-voltage and ultra-high-voltage; given the high heat dissipation requirements, T-type cable trays are used. Instrument cables are typically low-voltage and generate little heat, so enclosed cable trays are used.