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Silicone Insulated Indoor Radiant Floor Heating Cable
Short Description:
Silicone rubber floor heating installation wires are specially designed for underfloor heating systems, providing reliable power distribution in residential and commercial applications. They feature high-temperature resistance, flexibility, excellent insulation, and long-term stability, ensuring safe and efficient operation even under continuous heating conditions. The wires are resistant to aging, moisture, and mechanical stress, making them suitable for installation in concrete, tiles
Product Introduction
Selection Guidelines
Classification standard
Installation and Maintenance Precautions
| Dimension | Detailed Description |
|---|---|
| Product Definition | A special type of installation cable specially developed for indoor radiant heating (underfloor heating) systems, which uses high-performance silicone rubber as the core integrated insulation and sheath material. It is adapted to the special working conditions of underfloor heating systems such as long-term high-temperature circulation, humid environment, underground buried laying, thermal expansion and contraction deformation, and high safety flame retardant requirements. It is the core safety supporting component for stable power supply and precise temperature control signal transmission in underfloor heating systems. |
| Core Application Scenarios | 1. Indoor hydronic underfloor heating systems: power supply for manifolds, signal transmission for thermostats, power supply for electric thermal actuators, and control circuits for circulating pumps;2. Indoor electric underfloor heating systems: power supply for heating cables, signal transmission for thermostats, and signal circuits for floor temperature sensors;3. Supporting scenarios: wall/ceiling radiant heating, intelligent underfloor heating control systems, and supporting power supply and signal circuits for heat pump underfloor heating. |
| Core Characteristics | 1. Excellent high temperature resistance and thermal cycle stability: long-term allowable operating temperature ranges from -60℃ to 180℃, which can withstand the long-term high-temperature circulation and thermal expansion and contraction deformation of the underfloor heating system, with no attenuation of insulation performance, far exceeding ordinary PVC/XLPE cables;2. High flexibility and strong deformation resistance: silicone rubber material has high softness and low elastic modulus, can be laid with an extremely small bending radius, perfectly adapts to the complex laying paths of floors, walls and corners, and has excellent bending resistance and fatigue fracture resistance;3. High flame retardant, low smoke and non-toxic safety performance: pure silicone rubber material itself has self-extinguishing properties, no dripping, low smoke and non-toxic, releases no corrosive toxic gases during combustion, and can reach the highest flame retardant grade Class A of GB 31247, which fully meets the fire safety requirements of indoor living environments;4. Outstanding moisture resistance and chemical corrosion resistance: can long-term withstand the humid environment of the underfloor heating system and alkaline corrosion of cement/concrete, with excellent water, acid, alkali and oil resistance, and the insulation performance is not affected by the humid environment;5. Excellent mechanical pressure resistance and wear resistance: can withstand the static pressure of underground buried laying on the floor and rolling wear during construction, the sheath has strong tear and puncture resistance, which is suitable for the construction and long-term use conditions of underfloor heating engineering. |
| National/Industry Implementation Standards | 1. Underfloor heating engineering standard: JGJ 142 Technical Specification for Radiant Heating and Cooling;2. Basic cable standard: GB/T 5013 Series Standards for Rubber Insulated Cables for Rated Voltages up to and Including 450/750V;3. Safety performance standards: GB/T 19666 General Rules for Flame Retardant and Fire Resistant Wires and Cables, GB 31247 Classification of Burning Performance of Cables and Optical Cables;4. Material standard: GB/T 2951 General Test Methods for Cable Insulation and Sheath Materials. |
| Model Selection Module | Core Points | Detailed Description and Red Line Requirements |
|---|---|---|
| Core Red Line Principles for Model Selection | Compliance First | 1. All model selection must comply with the current national cable standards and underfloor heating engineering specifications. For indoor living scenarios, compliant products with 3C mandatory certification, up-to-standard flame retardant performance, and low smoke and non-toxic properties must be selected;2. Non-standard products without test reports and certification are strictly prohibited, especially for the power supply lines of electric underfloor heating systems, which must ensure that the current carrying capacity, insulation performance and flame retardant performance all meet the standards;3. The rated voltage, temperature resistance grade, flame retardant grade and current carrying capacity must be higher than the maximum requirements of the actual application scenario. Low-specification models are strictly prohibited from being used beyond their applicable scenarios. |
| Scenario Matching | 1. Fully adapt to the type of underfloor heating system (hydronic/electric), laying environment, operating temperature, mechanical pressure, and fire safety requirements;2. For electric underfloor heating systems, special models with high temperature resistance and sufficient current carrying capacity redundancy must be selected; for hydronic underfloor heating systems, models with moisture resistance and alkaline corrosion resistance must be selected;3. For underground buried laying on the floor, armoured/high tear resistant models must be selected; for wall/ceiling laying, ordinary non-armoured models can be selected; for signal transmission, shielded models must be selected; for frequent movement scenarios, high flexibility models must be selected. | |
| Performance Adaptation | 1. The current carrying capacity, insulation performance, signal transmission performance and mechanical performance must fully meet the actual application requirements of the underfloor heating system, with a 10%~20% redundancy reserved;2. Operation beyond the rated voltage, long-term operating temperature, minimum bending radius and current carrying capacity is strictly prohibited;3. Take into account the economy and construction convenience, give priority to general-purpose models, and avoid excessive customization that leads to difficulties in later operation and maintenance. | |
| Core Parameter Selection | Matching Selection for Underfloor Heating System Type | 1. Hydronic underfloor heating system: priority is given to special models for hydronic underfloor heating. The number of cores is determined according to the power supply + signal requirements of the manifold, thermostat and circulating pump. The conductor cross section is 1.5mm²~2.5mm² for power supply cores and 0.5mm²~1.0mm² for signal cores;2. Electric underfloor heating system: special models for electric underfloor heating must be selected. The cross section of the power supply core wire is determined according to the power and current carrying capacity of the heating cable, with the minimum cross section not less than 2.5mm². The temperature control signal core wire adopts shielded type 0.5mm²~1.0mm²;3. Intelligent underfloor heating system: priority is given to power supply + signal composite models, or shielded signal control models, to ensure stable signal transmission without electromagnetic interference. |
| Conductor Specification and Current Carrying Capacity Selection | 1. Conductor material: oxygen-free copper conductor is selected for conventional scenarios, and tinned copper conductor is selected for high temperature/high humidity scenarios to improve oxidation resistance;2. Conductor cross section:① Power supply line: 1.5mm² for load within 10A, 2.5mm² for 10A~16A load, 4mm² for 16A~25A load, 6mm² for 25A~32A load;② Signal control line: 0.5mm²~0.75mm² for conventional temperature control signals, 0.75mm²~1.0mm² for high-precision sensor signals;3. Current carrying capacity verification: according to the laying method, ambient temperature, and number of parallel cables, verify that the allowable current carrying capacity of the cable ≥ the actual maximum operating current, with a redundancy of more than 10% reserved. Operation beyond the current carrying capacity is strictly prohibited;4. Conductor structure: single strand/7 strand hard conductor is selected for fixed laying, and multi-strand ultra-fine flexible conductor is selected for mobile/bending scenarios. | |
| Structure and Safety Performance Selection | 1. Insulation and sheath material: for indoor underfloor heating scenarios, pure silicone rubber or high flame retardant modified silicone rubber material must be selected, and ordinary PVC material is strictly prohibited, to ensure stable insulation performance and low smoke and non-toxic properties at high temperatures;2. Shielding structure: for signal control lines and intelligent temperature control lines, an overall shielding structure must be selected; for high-precision sensor signals, priority is given to overall shield + pair shield double layer shielding, with shielding coverage ≥85%, to avoid electromagnetic interference;3. Armouring structure: for direct buried laying on the floor and concrete pouring scenarios, a steel tape armouring structure must be selected, which has mechanical pressure and puncture resistance, to avoid cable damage during construction;4. Flame retardant grade: for indoor living scenarios, models with flame retardant grade ≥ Class B must be selected; for scenarios such as bedrooms, children's rooms and hospitals, models with Class A ultra high flame retardant grade must be selected to ensure fire safety. | |
| Voltage Grade Selection | 1. Conventional underfloor heating power supply/signal lines: priority is given to 450/750V rated voltage, which has strong versatility and complete accessory matching, and is fully suitable for indoor 220V/380V power supply systems;2. High-power power supply lines for electric underfloor heating: 0.6/1kV rated voltage can be selected, with more stable insulation performance and more sufficient current carrying capacity redundancy;3. Red line requirement: The rated voltage of the cable must be higher than the maximum operating voltage of the system, and operation beyond the rated voltage is strictly prohibited. | |
| Scenario Adaptation Verification | Laying Environment Verification | 1. Temperature verification: confirm that the long-term allowable operating temperature of the cable ≥ the maximum operating temperature of the underfloor heating system + conductor operating temperature rise, and a temperature resistance redundancy of more than 20℃ must be reserved for electric underfloor heating scenarios;2. Moisture/corrosion verification: confirm that the moisture resistance and alkaline corrosion resistance of the cable fully adapt to the humid environment of the underfloor heating system and the alkaline corrosion of cement/concrete. For hydronic underfloor heating scenarios, special moisture resistant models must be selected;3. Mechanical pressure verification: confirm that the mechanical pressure resistance and puncture resistance of the cable fully match the laying method. For underground buried laying on the floor, armoured/high tear resistant models must be selected;4. Flame retardant safety verification: select cables of corresponding flame retardant grade according to the fire safety requirements of the application scenario. Non-flame retardant, high smoke and toxic cables are strictly prohibited in indoor living scenarios. |
| Laying Parameter Verification | 1. Bending radius verification: confirm that the minimum allowable bending radius of the cable ≤ the actual laying bending radius. The minimum bending radius for fixed laying is ≥10 times the cable outer diameter, and for mobile laying is ≥15 times the cable outer diameter. Laying with excessive small bending radius is strictly prohibited to avoid damage to the cable insulation layer;2. Laying space verification: confirm that the outer diameter and structure of the cable fully match the laying trench, pipeline, cable tray and installation space to avoid installation failure;3. Construction adaptability verification: confirm that the flexibility and structure of the cable adapt to the construction technology of the underfloor heating engineering, such as concrete pouring, floor slotting, wall pipe penetration, etc., to avoid cable damage during construction. | |
| Electrical Performance Verification | 1. Current carrying capacity verification: according to the laying method, ambient temperature, and number of parallel cables, verify that the allowable current carrying capacity of the cable ≥ the actual maximum operating current, with a redundancy of more than 10% reserved;2. Voltage drop verification: verify that the line voltage drop of the cable ≤ the maximum allowable voltage drop of the system. For long-distance transmission, the conductor cross section must be increased;3. Short circuit current verification: verify that the short circuit thermal stable current of the cable ≥ the maximum short circuit current of the system to ensure that the cable will not be broken down in short circuit scenarios;4. Signal transmission performance verification: for signal control lines, the capacitance, attenuation and anti-interference performance of the cable must be verified to fully match the signal transmission requirements of the temperature control system and sensors. | |
| Compliance and Supporting Selection | Certification and Test Confirmation | 1. It must be confirmed that the target product has a complete factory test report, and the test items cover core indicators such as electrical performance, mechanical performance, flame retardant performance, and temperature resistance performance;2. For cables used in indoor underfloor heating scenarios, it must be confirmed that they have 3C mandatory certification, the certification is within the validity period, and the certification scope covers the selected specifications;3. Non-standard products without certification and test reports are strictly prohibited, especially for the power supply lines of electric underfloor heating systems, which must ensure compliance. |
| Supporting Accessory Selection | 1. Special accessories that fully match the voltage grade, specification and material of the cable must be selected simultaneously, including wiring terminals, connectors, thermostat junction boxes, manifold wiring boxes, penetration pipes, and fixing parts;2. For high flame retardant/fire resistant scenarios, supporting accessories of corresponding flame retardant/fire resistant grade must be selected to ensure the safety performance matching of the whole link;3. For shielded signal lines, suitable shielded connectors and grounding terminals must be selected to ensure reliable grounding of the shielding layer and up-to-standard anti-interference effect. | |
| Operation and Maintenance Supporting Confirmation | 1. Priority is given to models with large market holdings and strong versatility to ensure convenient later accessory supply and operation and maintenance replacement;2. Excessively customized non-standard models are avoided to prevent excessive later operation and maintenance costs and replacement difficulties;3. It is confirmed that the manufacturer has complete after-sales technical support and on-site construction guidance services to ensure the correct installation and use of the cable. |
| Classification Dimension | Sub-category | Core Definition and Characteristics | Typical Model Examples |
|---|---|---|---|
| By Underfloor Heating System Type (Core Classification) | Special Silicone Rubber Installation Cable for Hydronic Underfloor Heating | Designed for the low-temperature circulation, humid environment, and manifold/thermostat supporting conditions of hydronic underfloor heating systems, with excellent moisture resistance, alkaline corrosion resistance and thermal cycle stability. The number of cores ranges from 2 to 8, which is suitable for the composite transmission demand of power supply and signals. | DR-YG, DR-YGC, DR-KGG, DR-YGV |
| Special Silicone Rubber Installation Cable for Electric Underfloor Heating | Designed for the long-term high temperature, high-power power supply, and underground buried laying conditions of electric underfloor heating systems, with outstanding high temperature resistance, sufficient current carrying capacity redundancy, and excellent mechanical pressure resistance and wear resistance. It covers single-core and multi-core structures, and is suitable for power supply of heating cables and temperature control signal transmission. | DR-YG-D, DR-YGC-D, DR-KGG-D, DR-YGV-D | |
| By Core Application | Power Supply Type Silicone Rubber Installation Cable | Single-core/2-core/3-core structure, conductor cross section 1.5mm²~6mm², with sufficient current carrying capacity and stable insulation performance. It is suitable for the power supply demand of circulating pumps, manifolds, electric thermal actuators and heating cables in underfloor heating systems. | YG, YGC, DR-YG-2, DR-YGC-3 |
| Signal Control Type Silicone Rubber Installation Cable | Multi-core structure (4 cores~8 cores), conductor cross section 0.5mm²~1.5mm², with excellent shielding performance, stable signal transmission and strong anti-electromagnetic interference capability. It is suitable for signal transmission of underfloor heating thermostats, temperature sensors and intelligent control systems. | KGG, KGV, DR-KGG-4, DR-KGG-6P | |
| Power Supply + Signal Composite Type Silicone Rubber Installation Cable | Composite core structure, integrating large cross section power supply cores and small cross section signal cores, which can meet the power supply and signal transmission requirements at the same time. It has a compact structure and convenient laying, and is suitable for the integrated supporting of underfloor heating manifolds and intelligent control boxes. | YG-K, YGC-KP, DR-YG-K4, DR-YGC-K6P | |
| By Structural Characteristics | Non-armoured Ordinary Type Silicone Rubber Installation Cable | No metal armouring layer, simple structure, convenient laying, excellent flexibility and moderate cost. It is suitable for indoor wall, ceiling, and floor trench laying scenarios without mechanical pressure. | YG, YGC, KGG, DR-YG |
| Shielded Type Silicone Rubber Installation Cable | Added copper mesh/aluminum foil shielding layer, with extremely strong anti-electromagnetic interference capability and high signal transmission stability, which avoids the mutual interference between the power supply line and signal line of the underfloor heating system. It is suitable for signal transmission scenarios of intelligent temperature control and high-precision temperature sensors. | KGG, YGP, YGCP, DR-KGG-P | |
| Armoured Type Silicone Rubber Installation Cable | Added steel tape/steel wire armouring layer, with excellent mechanical impact, compression and puncture resistance, and high protection level. It is suitable for direct buried laying on the floor and scenarios with mechanical pressure risk, and can withstand the construction pressure of concrete pouring. | YGV22, YGC22, DR-YGV22, DR-YGC22 | |
| High Flexibility Drag Chain Type Silicone Rubber Installation Cable | Composite structure of multi-strand ultra-fine flexible conductor + high tear resistant silicone rubber insulation + wear-resistant sheath, which can achieve more than 5 million times of repeated bending without fracture, and the minimum bending radius can reach 5 times the cable outer diameter. It is suitable for the equipment supporting lines that need frequent movement and bending in the underfloor heating system. | YG-TR, YGC-TR, DR-YG-TR | |
| By Flame Retardant Safety Grade | Ordinary Flame Retardant Type Silicone Rubber Installation Cable | Flame retardant grade ≥ Class C of GB 31247, no dripping, low smoke. It is suitable for conventional areas in underfloor heating systems without special fire safety requirements. | YG, YGC, KGG |
| High Flame Retardant Type Silicone Rubber Installation Cable | Flame retardant grade ≥ Class B of GB 31247, low smoke and non-toxic, no dripping, strong self-extinguishing property. It is suitable for conventional areas of indoor underfloor heating systems in residential and commercial buildings. | ZB-YG, ZB-YGC, ZB-KGG | |
| Ultra High Flame Retardant Type Silicone Rubber Installation Cable | Flame retardant grade ≥ Class A of GB 31247, completely non-combustible, no dripping, extremely low smoke density. It is suitable for underfloor heating scenarios with extremely high fire safety requirements such as residential bedrooms, children's rooms, hospitals and schools. | ZA-YG, ZA-YGC, ZA-KGG | |
| Fire Resistant Type Silicone Rubber Installation Cable | Fire resistant grade ≥ Class N of GB 19666, which can maintain normal power supply for more than 90 minutes in 950℃ flame, and also has high flame retardant and high temperature resistance characteristics. It is suitable for fire emergency power supply and temperature control signal lines of underfloor heating systems. | NH-YG, NH-YGC, NH-KGG |
| Maintenance Level | Maintenance Items | Execution Cycle | Operation Standard | Abnormal Handling Method |
|---|---|---|---|---|
| Special Protection During Construction Phase (Core Pre-maintenance) | Cable Incoming Acceptance | When the cable enters the site | 1. Check the model specification, certification certificate and test report of the cable to confirm that it is consistent with the model selection requirements;2. Check the appearance of the cable, the sheath is free of damage, cracking, deformation, the insulation layer is intact, and there is no trace of moisture or water ingress;3. Test the insulation resistance of the cable with a megohmmeter, the insulation resistance is ≥10MΩ·km, and there is no short circuit or open circuit. | 1. If the cable model specification is inconsistent, without certification or test report, it is strictly prohibited to enter the site for use, and must be returned and exchanged immediately;2. If the cable sheath is damaged, the insulation layer is damaged, or moisture/water ingress is found, it is strictly prohibited to use, and must be replaced immediately;3. If the insulation resistance is not up to standard, short circuit or open circuit is found, it is strictly prohibited to use, and must be replaced immediately. |
| Protection During Construction | Throughout the construction period | 1. Before cable laying, check that the trenches, pipelines and cable trays of the laying path are free of sharp objects and burrs to avoid the cable being scratched or punctured during laying;2. During cable laying, it is strictly prohibited to bend, twist or drag the cable with an excessive small bending radius, and it is strictly prohibited to roll or step on the cable;3. Before concrete pouring and floor leveling, check that the cable sheath is intact and free of damage, and the fixing is firm. Special personnel shall be arranged for monitoring during the pouring process to avoid damage to the cable by construction machinery;4. After the cable laying is completed, do a good job of sealing protection in time to avoid moisture and water ingress at the cable ends, and make identification marks for later operation and maintenance. | 1. If the cable sheath is damaged or the insulation layer is damaged during laying, stop the construction immediately, replace the damaged cable, and it is strictly prohibited to continue to use after repair;2. If the cable is bent or twisted with an excessive small bending radius, re-lay the cable in a standardized manner immediately, and test the insulation performance;3. If the cable is rolled or punctured during concrete pouring, stop the construction immediately, replace the damaged cable, and re-lay it. | |
| Daily Inspection (Heating Season) | Appearance and Operating Status Inspection | Once a week during the heating season | 1. Check the cable laying path, junction box, thermostat, manifold, the cable sheath is free of damage, aging, deformation, and no exposed insulation layer;2. Check the cable joints, wiring terminals and connectors, no heating, sparking, looseness, oxidation, and the seal is intact without damage;3. Check the laying status of the cable, no looseness, falling, excessive bending, dragging, and no risk of being rolled by equipment or furniture;4. Check the operating environment of the cable, no high temperature heat source, open flame, flammable and explosive media, acid and alkali corrosive medium leakage, and no potential safety hazards. | 1. If slight damage or aging of the sheath is found, mark it immediately, and arrange for professional personnel to repair it after power off;2. If exposed insulation layer, joint heating and sparking, or serious cable deformation are found, cut off the power and stop the machine immediately, continue to use is strictly prohibited, and arrange for professional personnel to test and replace the cable;3. If the cable is rolled, excessively bent or dragged, cut off the power immediately, test the insulation performance and conductor integrity of the cable, and replace it immediately if it is unqualified;4. If the cable is close to a high temperature heat source or corrosive medium leakage is found, clean and isolate it immediately, check the cable damage, and replace it if necessary. |
| Temperature Control and Signal System Inspection | Once a week during the heating season | 1. Check the signal lines of the thermostat and temperature sensor, the connection is firm, no looseness or falling off, the signal transmission is stable, and the temperature control data is accurate;2. Check whether the grounding of the shielding layer is reliable, no looseness or breakage, to avoid signal abnormality caused by electromagnetic interference;3. Check the power supply lines of the electric thermal actuator and circulating pump, the operation is normal, and there is no abnormal heating or noise. | 1. If the signal line is loose or falls off, reconnect it firmly immediately after power off, and test the stability of signal transmission;2. If abnormal temperature control data or signal interference is found, check the line immediately, test whether the shielding layer grounding is reliable, and replace the shielded cable if necessary;3. If abnormal heating of the power supply line or abnormal equipment operation is found, cut off the power and stop the machine immediately, check the line fault, and replace the damaged cable. | |
| Regular Special Tests | Insulation Resistance and Earthing Continuity Test | Once before the heating season, once after the heating season | 1. In the power-off state, use a 500V megohmmeter to test the insulation resistance between the cable cores and between the cable core and the earth, the insulation resistance is ≥10MΩ·km;2. Use an earth resistance tester to test the earthing continuity of the cable shielding layer, armouring layer and earthing terminal, the earth resistance value is ≤4Ω, and the conduction resistance between the shielding layer and the earthing terminal is ≤0.5Ω;3. The test environment temperature is 20℃±5℃, the relative humidity is ≤80%, and the cable must be fully discharged before the test to ensure the accuracy of the test data. | 1. If the insulation resistance is lower than the standard value, check the cause immediately, and test whether there is moisture, damage, aging, or water ingress;2. If the insulation resistance drops by more than 30%, arrange for professional personnel to conduct a comprehensive test immediately, and replace the cable if necessary;3. If the insulation resistance is found to be 0, cut off the power immediately, continue to use is strictly prohibited, check the short circuit point and replace the cable;4. If the earth resistance exceeds the standard or the shielding layer earthing is invalid, repair it immediately to ensure reliable earthing, and avoid electromagnetic interference and electrostatic accumulation. |
| Special Inspection of Joints and Terminals | Once before the heating season, once after the heating season | 1. In the power-off state, check the sealing performance of the cable joints, terminals and connectors, no leakage, cracking, deformation or aging;2. Use an infrared thermometer to test the surface temperature of the joints, terminals and wiring terminals, no abnormal heating, the temperature difference with the cable body is ≤5℃;3. Check the wiring terminals for looseness, oxidation, burning, the tightening torque meets the standard, and no discharge or sparking trace. | 1. If the joint seal is invalid, leakage or cracking is found, cut off the power and stop the machine immediately, re-seal it, and test the insulation performance;2. If abnormal heating or excessive temperature difference of the joint is found, check the cause immediately, test whether there is virtual connection, oxidation or overload, and re-make the joint or replace the connector if necessary;3. If the wiring terminal is loose or burnt, cut off the power and tighten it immediately, replace the damaged terminal, and ensure the reliable connection. | |
| Current Carrying Capacity and Temperature Monitoring | Once in the middle of the heating season | 1. When the underfloor heating system is running at full load, use an infrared thermometer to test the surface temperature of the cable conductor and outer sheath, arrange test points evenly along the full length of the cable, and focus on testing the joints, turns, and densely laid parts;2. The outer sheath temperature of the cable is ≤ the long-term allowable operating temperature of the insulation material, and no local over temperature point or abnormal temperature rise;3. Test the influence of the ambient temperature and laying method on the current carrying capacity, and verify whether the actual operating current of the cable is within the allowable current carrying capacity range. | 1. If local over temperature or abnormal temperature rise of the cable is found, check the cause immediately, and test whether there is overload, local short circuit, insulation aging, or poor contact;2. If the operating current exceeds the allowable current carrying capacity, reduce the load immediately, check the cause of overload, and replace the cable with a larger cross section if necessary;3. If the overall temperature of the cable is generally over temperature, stop the machine immediately, check the influence of the ambient temperature, laying method and heat dissipation conditions, and optimize the laying and heat dissipation scheme. | |
| Annual Comprehensive Test and Long-term Operation and Maintenance | Comprehensive Electrical Performance Test | Once a year (after the heating season) | 1. Complete the full set of electrical performance tests of the cable according to the national standard requirements, including core indicators such as insulation resistance, withstand voltage, conductor resistance, capacitance, dielectric loss, and earth resistance;2. All test indicators must meet the national standard and product technical requirements, and no unqualified items;3. Compare the test data over the years, analyze the change trend of cable performance, predict the aging condition, and formulate operation and maintenance and replacement plans. | 1. If the test indicators are unqualified, check the cause immediately, and replace the cable if necessary;2. If the cable performance continues to decline and the aging trend is obvious, formulate a replacement plan in advance to avoid sudden faults during the heating season;3. If the transmission performance of the signal control line decreases, check it immediately and replace the unqualified cable. |
| Full Life Cycle Ledger Update | Once a year / after each maintenance and replacement | 1. Establish a full life cycle operation and maintenance ledger for the cable, recording the cable model specification, laying date, laying position, test records, maintenance records, replacement records, and scrap records;2. Update the ledger in time after each test, maintenance, and replacement to ensure the ledger information is complete and traceable;3. After the annual test is completed, fully update the ledger, analyze the operating status of the cable, and formulate the operation and maintenance, test, and replacement plan for the next year. | 1. If the ledger information is missing or incomplete, complete it immediately to ensure the operation and maintenance information of all cables is traceable;2. If the cable operating life is close to the design service life, formulate a replacement plan in advance to avoid extended use;3. Cables that have been repaired many times and have continuous performance decline shall be included in key monitoring, and scrapped and replaced in advance if necessary. | |
| Scrap and Replacement Management | Implemented according to actual test results | 1. The cable must be scrapped and replaced immediately if any of the following conditions occurs:① The insulation resistance and withstand voltage test are unqualified and cannot be repaired;② The outer sheath and insulation layer are seriously damaged, aged and cracked and cannot be repaired;③ The conductor core is broken or short circuited and cannot be repaired;④ The operating life exceeds the product design service life, and the performance is seriously reduced;⑤ Accidents such as short circuit, overload, fire, mechanical rolling have occurred, and the cable performance is damaged;2. Scrap cables must be marked, strictly prohibited from being reused, and disposed of according to environmental protection regulations;3. The replacement cable must be a compliant product of the same specification and model to ensure performance matching, and can be put into use only after passing the test after installation. | 1. If the cable meets the scrap conditions, cut off the power and stop the machine immediately, continue to use is strictly prohibited, and arrange for professional personnel to replace it;2. The replacement cable must be laid, installed and tested in strict accordance with the specifications, and can be put into use only after passing the test;3. Scrap cables shall be disposed of in accordance with environmental protection requirements, and random discarding, secondary sales and non-standard reuse are strictly prohibited. | |
| Operation and Maintenance Personnel Training and Specification Update | Once a year | 1. Conduct training on cable professional knowledge, operation specifications, and safety procedures for operation and maintenance personnel, who can only take up their posts after passing the assessment;2. Update the latest national/industry standards and specifications in a timely manner, and synchronously update the operation and maintenance management system and operation standards;3. Summarize the annual operation and maintenance experience, analyze the causes of high-frequency faults, optimize the operation and maintenance plan, and improve the operation and maintenance management level. | 1. Operation and maintenance personnel who fail the training assessment are strictly prohibited from taking up their posts to operate;2. If the operation and maintenance system is not updated in a timely manner after the standards and specifications are updated, rectify it immediately;3. For high-frequency faults occurring in the annual operation and maintenance, formulate a special rectification plan to avoid repeated occurrence. |