What are the wire and cable testing items?

The testing items of wires and cables cover many aspects to ensure that their quality, safety and performance meet relevant standards. The following are some of the main testing items:

1. Electrical performance test

Conductor resistance: Test the conductive performance of wires and cables, that is, the resistance value, which is an important indicator for evaluating the current transmission capacity of wires and cables.
Insulation resistance: Detect the resistance value of insulating materials to evaluate their insulation performance under the action of electric fields and prevent current leakage and short circuits.
Power frequency withstand voltage test: Use AC voltage to test the withstand voltage of wires and cables to check whether their insulation performance is stable under the specified voltage.
Leakage current (leakage current): Under the rated working voltage, check the leakage current of wires and cables to ensure that they will not cause safety problems due to excessive leakage current under normal working conditions.

2. Mechanical properties testing

Flex test, static flex test, bending test: evaluate the mechanical strength and durability of wires and cables during repeated bending or twisting.
Wear test: test the wear resistance of the surface of wires and cables to determine whether they are prone to wear during long-term use.
Twist test: simulate the twisting force that wires and cables may be subjected to in actual use to test their anti-twist ability.

3. Non-electrical performance testing

Insulation thickness and sheath thickness measurement: Ensure that the thickness of the insulation layer and sheath layer of the wire and cable meets the standard requirements to ensure its insulation performance and mechanical protection performance.
Dimension and ovality measurement: Check whether the dimensions and ovality of the wire and cable meet the design requirements to ensure the convenience of its installation and use.
IV. Special performance testing
Halogen content determination: Especially for low-smoke halogen-free cables, it is necessary to determine the halogen content in the cable to evaluate its application safety in a specific environment.
Flame retardant performance test: Evaluate the flame retardant performance of wires and cables according to relevant standards to ensure that they can slow down the spread of fire in emergency situations such as fire.

4. Special performance testing

Halogen content determination: Especially for low-smoke halogen-free cables, it is necessary to determine the halogen content in the cables to evaluate their application safety in specific environments.
Flame retardant performance test: Evaluate the flame retardant performance of wires and cables according to relevant standards to ensure that they can slow down the spread of fire in emergency situations such as fires

5. Other testing items

Sample extraction: Determine the sampling method and sample quantity in accordance with relevant standards to ensure the representativeness of the test results.
Marking detection: Confirm whether the markings on the wires and cables are clear, continuous and meet the standard requirements so that users can correctly identify and use them.

6. Testing standards

The testing items of wires and cables are usually carried out according to the current national standards, such as GB/T 5023, GB/T 9330, GB/T 12706, etc. These standards stipulate the performance indicators and testing methods of wires and cables, and provide an important basis for the quality control and market access of wires and cables.
In summary, the testing items of wires and cables cover electrical properties, mechanical properties, non-electrical properties, special properties and other aspects to ensure that their quality, safety and performance meet the relevant standards and requirements.