Allowable temperature of conductor?
The permissible temperature of the conductor depends on the type of material and applicable standards. With conventional electrical wires, the allowable temperature is usually in the range of 70°C to 90°C. Higher temperatures can shorten wire life and increase the risk of fire and explosion.
Below are the allowable temperature limits of common conductor materials:
- Copper conductor: Copper is a popular material thanks to its good heat resistance, with allowable temperature limits up to 75°C, 90°C, or 105°C depending on the insulation layer and technical standards. . Advanced insulation layers can help raise the permissible temperature. Copper is commonly used in residential and industrial electrical systems, including power circuits, control systems, and electronics.
- PVC (Polyvinyl chloride): PVC is a popular material for electrical wires and network cables, with temperature limits from -15°C to 70°C. This is a cheap material, widely used in electronic and refrigeration equipment.
- PE (Polyethylene) conductor: PE is a lightweight, flexible and abrasion-resistant material, often used in wires and cables. The allowable temperature limit of PE is from -65°C to 75°C, suitable for low temperature environments.
- XLPE (Cross-linked Polyethylene): XLPE is a form of PE that has been cross-linked to improve heat and electrical resistance. The allowable temperature limit of XLPE is from -65°C to 90°C, popular in power and industrial applications.
In special environments such as factories, workshops or hot climates, the permissible temperature of the conductor can be raised to ensure stable operation. Some allowable temperature limits of other types of conductors include:
- EPR (Ethylene Propylene Rubber): EPR is a type of heat-resistant rubber, with the ability to operate from -50°C to 120°C or 150°C, commonly used in electrical conductors and temperature applications. High.
- EPDM (Ethylene Propylene Diene Monomer): EPDM, another heat-resistant rubber, has limits from -50°C to +120°C or 150°C, often used in outdoor applications and harsh environments. harsh.
- CPE (Chlorinated Polyethylene): CPE is a heat-resistant and weather-resistant material, with temperature limits from -18°C to 105°C, often used in the production of network cables.
- PTFE (Polytetrafluoroethylene): PTFE stands out with its excellent heat resistance, from -240°C to 290°C. This material has excellent electrical insulation properties and chemical resistance, making it suitable for special applications such as the chemical and medical industries.
What should you pay attention to to prevent the wire temperature from increasing?
To minimize the risk of wires heating up and ensure the electrical system operates stably and safely, you need to note the following points:
- Choose the appropriate conductor: Use conductors with heat and current resistance that meet system requirements or with higher allowable temperatures to ensure safety.
- Avoid overload: Ensure that the electrical load operates within the system's design range. Overloading the wires can increase the temperature and be dangerous.
- Protection devices: Use protective devices such as fuses and circuit breakers to regulate and protect electric current.
- Ventilation space: Install the system with enough ventilation space to reduce the operating temperature of the conductors, especially in narrow spaces or applications with many conductors running in parallel.
- Periodic checks: Perform periodic checks to detect early problems such as stuck wires, bad connections, or overheating of equipment that can cause overheating of wires. Use a thermal camera or infrared temperature gun to check.
- Insulation materials: In special applications, use insulation materials to protect conductors from the effects of ambient temperature.
- Comply with safety regulations: Always comply with electrical safety regulations and instructions to ensure the system operates safely and effectively.
Conclude:
- Periodic checks: Perform periodic checks to detect early problems such as stuck wires, bad connections, or overheating of equipment that can cause overheating of wires. Use a thermal camera or infrared temperature gun to check.
