The main standards for control cables include the following:
GB 9330.2-88: This standard applies to PVC insulated and PVC sheathed control cables used in control, monitoring, and protection circuits with an AC rated voltage of 450/750 V and below.
GB/T 9330-2008: This standard applies to plastic-insulated control cables, applicable to control cables with an AC rated voltage of 450/750 V and below.
These standards specify specific requirements for insulation materials, conductors, sheaths, markings, and test methods to ensure the performance and safety of cables in specific applications.
1. Core National Standards
GB/T 9330 Series: The latest version, released in 2020 (replacing the 2008 edition), specifies the classification, technical requirements, test methods, and inspection rules for control cables.
Scope of Application: Control cables insulated with polyvinyl chloride (PVC) or irradiated cross-linked polyethylene (XLPE) for electrical control systems, monitoring circuits, and protection circuits.
2. Technical Requirements
Conductor: Copper or aluminum, with diameter and resistivity meeting standards.
Insulation and Jacket: PVC or XLPE, with thickness, insulation resistance, and mechanical properties meeting standards.
Shielding and Armoring: Options such as KVVP (braided shield) and KVV22 (steel tape armor) meet different environmental requirements (e.g., interference resistance and mechanical resistance).
Temperature and Installation:
Long-term operating temperature: 70°C for PVC insulation and 90°C for XLPE insulation.
Laying temperature ≥ 0°C, bending radius ≥ 6 times the cable's outer diameter (unarmored).
3. Other Relevant Standards
Mining Control Cable: Comply with coal mine safety standards such as MT818-2009.
Special cable types, such as flame-retardant (ZR-KVV), fire-resistant (NH-KVV), and low-smoke, halogen-free (WDZ-KVV), must meet additional performance requirements.
4. Inspection and Acceptance
Test Methods: Includes conductor resistance, insulation resistance, withstand voltage, and mechanical properties tests.
Inspection Rules: Divided into factory inspection (for each batch) and type inspection (regular, comprehensive evaluation).
