In the daily use of electricity, it is common for wires to heat up, but if the temperature is too high, it may affect circuit safety and even cause fire. So, what are the reasons for the high temperature of wires? The following are five common reasons and countermeasures sorted by Asian Cable.
Excessive load and excessive current
The current carrying capacity of the wire is limited. When the current passing through exceeds its rated load, the wire will continue to heat up, causing the insulation layer to age, and even short circuit or fire. Therefore, when selecting wires, the appropriate wire diameter should be selected according to the actual power requirements to avoid long-term overload operation.
Poor contact and increased resistance
If the wire is loosely connected to the terminal and the contact is poor, the resistance of the contact point will increase, causing serious local heating. For example, if there is a virtual connection or oxidation in the switch, socket, junction box and other parts, it may cause abnormal temperature rise. Therefore, check the electrical contacts regularly to ensure that the connection is firm to avoid overheating problems caused by poor contact.
Mismatched wire specifications
If the wire diameter used is too small and cannot carry the actual current of the equipment, it will cause excessive resistance and severe heating. For example, copper wires of 4mm² or above should be used as power supply lines for high-power electrical appliances such as air conditioners, rather than ordinary 1.5mm² wires. Reasonable selection of cable specifications that meet national standards can effectively reduce the risk of overheating.
Improper wire laying methods and limited heat dissipation
If the wires are bundled too tightly, buried too deep, or no heat dissipation space is left, the heat is difficult to dissipate, which can easily lead to temperature rise. For example, if there are too many wires piled up in cable wells and pipelines, it will affect heat dissipation and cause the temperature to rise. Therefore, good ventilation and heat dissipation conditions should be ensured during wiring to avoid overheating of wires.
Excessive wire temperature is often caused by factors such as excessive load, poor contact, mismatched wire diameters, or poor heat dissipation. In daily use, reasonable selection of wire specifications, regular inspection of electrical contacts, and ensuring good heat dissipation can effectively prevent wire overheating and ensure electrical safety.
Post time: 2025-06-24
