Instrument wire installation

Instrument cables must be installed in strict accordance with **the regulations; otherwise, it may lead to fires caused by improper installation or problems with the cables aging such that they cannot be repaired in a timely manner. After installation, quality inspection must be carried out in accordance with the relevant requirements of GB50131-2007 \"Code for Acceptance of Construction Quality of Automated Instrumentation Projects\"; carelessness in this regard is not allowed. Next, the editor will give you a brief introduction to the specifications for the installation of instrument cables. 　　Specifications for the installation of instrument cables Cable selection specifications: (1) Select the required cables based on the specifications, models, and types indicated in the design drawings. 　　(2) Confirm the cable model based on the markings on the cable reel, and select and number the cable reels according to the order in which the cables are laid. 　　(3) The selection of cable specifications must comply with the design drawings. 　　Specifications for the installation of instrument cables The following rules apply when laying wires and cables for instrument circuits: 1. The ambient temperature during the installation of instrument cables should not be lower than the following values: ① 0°C for plastic-insulated cables; ② -15°C for rubber-insulated cables. 　　2. Cables should be laid in a proper manner without crossing; friction between cables and between cables and other hard objects should be avoided during laying; when fixing them, the tension should be appropriate. 　　3. The bending radius of multi-core control cables with plastic or rubber insulation shall not be less than 10 times their outer diameter. The bending radius of power cables shall comply with the relevant provisions of the current **standard \"Code for Construction and Acceptance of Cable Lines in Electrical Installation Works\" GB50168—92. 　　4. When instrument cables and power cables are laid intersectingly, they should be at a right angle; when laid parallel to each other, the distance between them shall comply with the provisions in the design documents. 　　5. Within the cable tray, the AC power supply circuits and instrument signal circuits should be laid separately using metal partitions. 　　6. When the cable is laid along the support, it should be tied down to prevent it from coming loose. 　　7. The clear distance between the openly laid instrument signal wires and electrical equipment with strong magnetic and electrostatic fields should be greater than 1.50 m; when shielded cables are used, or when the wires are placed in metal protective tubes or within covered metal cable trays, this distance should be greater than 0.80 m. 　　Specifications for the installation of instrument cables 8. When cables are installed in tunnels or trenches, they should be laid on supports or in cable trays. 　　9. After the cables are laid, cable ends should be prepared. 　　10. When manufacturing cable terminations, the insulating tape should be dry, clean, free of wrinkles, and without gaps between layers; when pulling out the shielding ground wire, the insulation should not be damaged; in humid or oily environments, appropriate measures to prevent moisture and oil contamination must be taken. 　　11. The cable laying for integrated control systems and digital communication lines shall comply with the requirements of the design documents and product technical documents. 　　12. The dedicated cable supplied with the equipment shall be installed in accordance with the instructions in the product’s technical documentation. 　　13. Compensation wires should be placed in protective tubes or laid in cable trays; they should not be buried directly in the ground. 　　14. When no switch or cold-junction temperature compensator is used between the compensation wire and the measuring instrument, it is advisable to connect the compensation wire directly to the instrument. 　　15. When connecting the compensation wire at the middle or ends, the polarity must not be connected incorrectly. 　　16. Instrument signal circuits, instrument power supply circuits, safety interlock circuits, compensation wires, intrinsically safe instrument circuits, and other special instrument circuits shall each use their own protective tubes.

Judging solely from the provided drawings, there are no issues

In the case of horizontal cable trays, the cables inside should be bundled together at regular intervals so that they lie evenly within the tray. Add one or three brackets at the corner; bundle the cables together with wire and lay them flat at the corner to prevent them from drifting toward the inside. In the case of vertical trough boxes, a fixing bracket should be installed every meter or so; the cables should be bundled together using wire to prevent them from all gathering on the lower side. Fixing brackets should also be installed at the elbows to prevent the cables from gathering all on the lower side.

What more can you ask for when laying instrument cables? It’s not realistic to have them in rows for each one; it’s good enough as it is. There are many requirements for the installation of electrical cables, which must be carried out in strict accordance with the specifications.

In summer, the temperature is high; materials expand when heated and contract when cooled. How much wire can you save by pulling it so tight? In winter, such wires have to withstand tension, which is not good for them

The necessary bending radius still needs to be taken into account; in addition, it is also essential to tie and secure the cables

The turning radius is too small; it should be made larger. :):)