UL Standard Thermoplastic Insulated Wires and Cables

The LINSHENG UL Standard Thermoplastic Insulated Wires and Cables lineup includes three major models—THHN, THWN, and THWN-2—all fully compliant with the North American NEC electrical code. Manufactured in a modern, standardized facility, these products overcome the common issues of damage caused by extreme weather and mechanical stress. Our proprietary thermoplastic elastomer (TPE) insulation is UV-resistant, corrosion-resistant, and age-resistant, while the high-purity oxygen-free copper conductors ensure excellent conductivity and stable signal transmission.

We implement a comprehensive three-stage quality control process—covering raw material spot checks, in-process monitoring, and finished product verification—with 100% electrical performance testing conducted before shipment. As a reliable supplier deeply engaged in the North American market, we possess full product certifications and ensure stable supply, fully meeting the safety and durability requirements of diverse electrical engineering projects.

Core Competitive Advantages

1. Professional Manufacturing Capabilities

LINSHENG boasts 15 years of experience in the R&D and production of cables meeting North American standards. Our facility strictly adheres to the ISO 9001:2015 quality management system, achieving a monthly production capacity of 5,000 kilometers through large-scale, precision manufacturing. Our products are exported to over 30 countries, with a strong presence in key markets like the US and Canada, supported by long-term, stable client relationships.

2. High-End Material Configuration

- Conductor Technology: We utilize 99.99% high-purity oxygen-free copper combined with Class K stranding technology. This ensures excellent conductivity, superior flexibility, and oxidation resistance, effectively minimizing current loss.

- Insulation Formulation: Proprietary TPE thermoplastic insulation material offering outstanding resistance to high and low temperatures, aging, and fire. It passes the UL 1581 VW-1 vertical flame test, featuring rapid self-extinguishing capabilities and no flaming droplets.

- Structural Optimization: Scientifically balanced insulation thickness and conductor diameter ensure a blend of mechanical strength and wiring flexibility, facilitating conduit installation and deployment in complex scenarios.

3. Rigorous Quality Inspection System

The factory implements a full-lifecycle quality traceability mechanism, assigning a unique batch number to every product lot. From raw material intake and production parameter control to performance spot-checks on finished goods, the entire process strictly adheres to UL standards, ensuring zero-defect products leave the factory.

Detailed Technical Parameters

1. Basic Electrical and Physical Parameters

2. Full-Specification Dimensional Parameters

Key Application Scenarios

These UL Standard Thermoplastic Insulated Wires and Cables comply with the US National Electrical Code (NEC) and cover a wide range of wiring scenarios: residential lighting and outlet circuits; commercial building HVAC, security, and fire alarm systems; and industrial PLC control and motor equipment wiring. Notably, the THWN-2 model is suitable for outdoor damp environments and direct-burial applications.

Engineering Application Cases

Case 1: Commercial Building Electrical Retrofit Project in Texas

In 2025, a local electrical contractor in Houston used LINSHENG 12AWG and 10AWG THHN cables to complete the electrical retrofit of eight high-rise commercial buildings. To address local issues where high summer temperatures and intense UV radiation accelerate cable aging, the product’s superior heat and UV resistance significantly reduced the likelihood of failure. 

Additionally, the cables' excellent flexibility improved conduit installation efficiency, cutting labor costs by 18%. After 12 months of operation, the system showed no signs of insulation aging or circuit faults and successfully passed UL standard acceptance inspections.

Case 2: Industrial Wiring Project for an Automotive Production Line in Michigan

An automotive assembly plant in Michigan replaced all aging cables in its production line sensors and motor control circuits with LINSHENG THWN-2 industrial cables. Designed for harsh operating conditions—characterized by workshop oil contamination, mechanical vibration, and significant temperature fluctuations—the product features a TPE insulation layer that offers oil resistance, deformation resistance, and signal stability. Since deployment eight months ago, equipment downtime caused by cable failures has dropped by 15%, leading to a significant boost in production efficiency.

FAQ

Q1: What is the difference between LINSHENG THHN and THWN-2 cables, and how should I choose?

THHN is designed for indoor use with a 105°C temperature rating, making it suitable for wiring in dry residential and commercial indoor environments. THWN-2 features enhanced water and moisture resistance, supporting installation in damp environments and direct underground burial; it is ideal for outdoor, basement, and industrial damp settings. Selection should be based on the moisture conditions of the installation site; our engineers can provide tailored guidance.

Q2: Do LINSHENG UL Standard Thermoplastic Insulated Wires and Cables fully comply with North American electrical codes?

Yes, they are fully compliant. The products strictly adhere to UL 44, UL 83, and NEC electrical standards and hold comprehensive certifications, including UL, CSA, RoHS, and REACH. All technical parameters meet the required standards, ensuring smooth project acceptance in North American regions such as the US and Canada.

Q3: Do you offer customization services and support for large-volume orders?

We offer comprehensive OEM/ODM customization, allowing for tailored cable lengths, packaging specifications, and special technical parameters. Significant discounts are available for orders exceeding 10,000 feet. We also provide free samples for new clients, allowing for testing prior to bulk purchasing, ensuring a flexible and reliable partnership.