House Electric Wire Product Code and Usage Characteristics

Product Code Explanation

Series Code

• B: Represents fixed wiring. Fixed wiring is used for permanent electrical connections in buildings or other structures, providing a stable and reliable power supply.
• R: Represents connecting flexible wires. Flexible wires are more suitable for applications where movement or flexibility is required, such as in some electrical appliances or equipment that need to be moved frequently.

Insulation Material Code

• V: Stands for PVC insulation. PVC (Polyvinyl Chloride) is a commonly used insulation material due to its good electrical insulation properties, low cost, and ease of processing.
• YJ: Represents cross - linked polyolefin insulation. Cross - linked polyolefin has better heat resistance, mechanical properties, and environmental stress cracking resistance compared to PVC, making it suitable for more demanding applications.

Combustion Performance Code

• N: Indicates fire resistance. Fire - resistant cables can maintain their electrical integrity for a certain period of time in case of a fire, ensuring the continuous operation of critical electrical systems.
• W: Stands for halogen - free. Halogen - free cables do not release harmful halogen gases when burned, reducing the harm to the environment and human health.
• D: Represents low smoke. Low - smoke cables produce less smoke during a fire, which helps to improve visibility and reduce the risk of suffocation.
• Z: Indicates flame retardant. Flame - retardant cables can prevent or slow down the spread of fire, enhancing the safety of the electrical system.
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Usage

This series of products is suitable for fixed connections of power, lighting, electrical equipment, instruments, and telecommunications equipment with a rated AC voltage of 450/750V and below. These cables play a crucial role in providing a stable power supply and signal transmission for various electrical and electronic devices in different fields.

Usage Characteristics

Rated Voltage

The rated power frequency voltage U0/U is 450/750V. When used in DC systems, the nominal voltage of the system should not exceed 1.5 times the rated voltage of the cable. This ensures the safe and proper operation of the cable in different electrical environments.

Laying Temperature

The cable laying temperature shall not be lower than 0 ℃. Low temperatures can make the cable insulation and sheath materials more brittle, increasing the risk of damage during installation. Therefore, it is necessary to ensure that the laying temperature meets this requirement.

Maximum Allowable Long - Term Working Temperature

• BV type: The maximum allowable long - term working temperature for BV type cable conductors does not exceed 70 ℃.
• Other types: For other types of cables, the maximum allowable long - term working temperature does not exceed 90 ℃. Maintaining the conductor temperature within the allowable range is essential for the long - term performance and safety of the cable.

Bending Radius

The bending radius of the cable should not be less than 6 times the outer diameter. A proper bending radius helps to prevent damage to the cable insulation and conductors, ensuring the normal operation of the cable.