The laying specifications and wiring techniques of control cables are crucial for ensuring the reliable operation of the system.

The laying specifications of control cables are the foundation for ensuring the long-term reliable operation of the control system and require reasonable design based on site conditions and cable characteristics. In selecting the laying path, control cables should maintain sufficient distance from power cables to avoid electromagnetic interference; when crossing is unavoidable, they should cross perpendicularly or be shielded and isolated. Control cables should avoid contact with heat sources, oil, and corrosive media during laying; protective conduits or isolation measures should be installed if necessary. The bending radius of the cable should be controlled within the specified range; excessive bending may damage the shielding or insulation layer, affecting signal transmission quality. When laying vertically, appropriate fixing supports should be installed to prevent the cable from sagging due to its own weight. When multiple control cables are laid in the same cable tray, they should be grouped by circuit for easy maintenance and management.

The wiring technique of control cables directly affects the reliability of signal transmission and is a key aspect of construction quality control. Before wiring, the cable core wire numbers and colors should be checked to ensure consistency with the drawings. Core wire connections should use dedicated terminals or terminal blocks, ensuring firm crimping and good contact. Grounding of the shielding layer is a critical aspect of wiring. A dedicated grounding clamp or grounding wire should be used, with reliable single-end grounding. The grounding point should be chosen to avoid ground loops, and grounding is generally performed at the signal receiving end. After wiring, continuity and insulation tests should be performed to confirm correct circuitry and good insulation. Terminals should be clearly labeled for easy maintenance and troubleshooting. For critical control circuits, spare core wires should be provided for expansion or replacement.

Maintenance and management of control cables are crucial for the long-term reliable operation of the system, requiring the establishment of standardized inspection and testing procedures. Regularly check the cable sheath for damage, aging, or deformation, and address any problems promptly. Inspect cable joints and terminals for overheating, loosening, or corrosion, and re-crimp or replace as necessary. For critical control systems, regular electrical parameter tests should be performed, including insulation resistance, loop resistance, and shielding layer grounding resistance tests, to promptly identify performance trends. During system upgrades or equipment replacement, cable compatibility should be rechecked, and adjustments or replacements should be made as necessary. Maintenance records should be fully maintained as a basis for cable condition assessment. By employing standardized installation procedures, meticulous wiring techniques, and systematic maintenance management, it is possible to ensure that control cables maintain good signal transmission performance during long-term operation, providing a fundamental guarantee for the stability and reliability of the control system.