What is UL 1387?

UL 1387 is a widely recognized standard in the electrical industry that pertains to flexible cords, cables, and cord sets. It provides guidelines and requirements for the safety, performance, construction, and testing of these products. Compliance with UL 1387 ensures that the cords and cables are safe to use and meet specific quality standards.

Construction and Components

The construction of cords and cables under UL 1387 involves several essential components. These include conductors, insulation, fillers, separators, shields, jackets, and terminations.

The conductors, made of copper or aluminum, carry the electrical current. Insulation, usually made of PVC or rubber, helps prevent electrical leakage and ensures proper insulation properties. Fillers and separators maintain the shape and positioning of conductors within the cable assembly.

Shields, such as braids or foils, protect against electromagnetic interference. Jackets, also known as sheaths, provide additional mechanical protection and insulation. Terminations are the connectors or plugs at both ends of the cord or cable that enable connection to specific devices.

Testing and Certification

To achieve UL 1387 certification, manufacturers must subject their cords and cables to rigorous testing procedures. These tests assess factors like conductor resistance, insulation resistance, voltage withstand, flame resistance, flexibility, and mechanical strength.

Conductor resistance testing measures how well the conductors allow the flow of electricity. Insulation resistance testing determines the effectiveness of the insulation in preventing current leakage. Voltage withstand testing evaluates the ability of the cord or cable to withstand high voltage without breakdown. Flame resistance testing assesses the material's ability to resist ignition and flame propagation.

Once all tests are successfully completed, the manufacturer can apply for UL 1387 certification. This certification demonstrates that the product has met the stringent safety and performance requirements set forth by UL (Underwriters Laboratories).

Benefits of Using UL 1387 Certified Products

Choosing cords and cables that comply with UL 1387 provides several benefits, including:

Safety: UL 1387 ensures that the products have undergone thorough testing for electrical and fire safety, reducing the risk of accidents or electrical hazards.

Reliability: UL certified products are manufactured according to strict quality standards, ensuring long-lasting and reliable performance.

Compliance: Using UL 1387 compliant cords and cables ensures conformity with industry regulations and standards, making them acceptable for use in various applications.

Peace of Mind: By choosing UL 1387 certified products, consumers can have confidence in the quality and safety of the cords and cables they purchase.

In conclusion, UL 1387 is a critical standard that sets guidelines and requirements for flexible cords, cables, and cord sets. Complying with UL 1387 ensures the safety, reliability, and compliance of these products. Testing and certification processes guarantee that these cords and cables meet strict quality standards, providing users with peace of mind and confidence in their purchase decisions.