
UL (formerly Underwriters Laboratories) is a US-based safety consulting and certification company. It played an instrumental role in the public adoption of electricity in the United States and the ongoing drafting of safety standards for electrical devices and components, including electrical cables.
CSA stands for Canadian Standards Association, a provider of product testing and certification services for a variety of products including electrical cables.
| Cable Model | Brief Introduction |
| AWM Wire | Appliance wiring cable for internal wiring of electrical equipment. |
| TW Wire | Thermoplastic insulated single wire for dry indoor fixed wiring. |
| THW Wire | Heat & moisture resistant thermoplastic wire, for wet/dry indoor places. |
| THHW Wire | High heat resistant thermoplastic wire, suitable for dry & damp locations. |
| THHN Wire | High heat resistant nylon-jacketed wire, mainly for dry conduit wiring. |
| THWN Wire | Heat & water resistant nylon wire, applicable to both dry and wet conduit. |
| THW-2 Wire | 90℃ heat & moisture resistant single wire for wet/dry building wiring. |
| THWN-2 Wire | 90℃ high temperature waterproof nylon wire for wet underground conduit. |
| XHH Wire | Cross-linked PE insulated wire, heat-resistant for dry fixed wiring. |
| XHHW Wire | XLPE insulated wire with heat & moisture resistance, for wet & dry locations. |
| XHHW-2 Wire | 90℃ cross-linked PE wire, waterproof, widely used in commercial building conduit. |
| RHW Wire | Rubber insulated wire, moisture-resistant for damp, wet underground wiring. |
| RHW-2 Wire | 90℃ heat-resistant rubber wire, suitable for wet locations and direct burial. |
| RHH Wire | Heat-resistant rubber insulated wire for dry high-temperature indoor wiring. |
| SJO Wire | Light-duty rubber flexible cord for small portable electrical tools. |
| SO Wire | Medium-duty rubber flexible cord for medium-load mobile equipment. |
| SJOO Wire | Light-duty oil-resistant rubber cord for handheld power tools. |
| SOO Wire | Medium-duty oil-resistant flexible rubber cable for workshop mobile machinery. |
| SOW Wire | Weather-resistant medium rubber cord, for outdoor portable electrical equipment. |
| SJOW Wire | Light-duty weather & oil resistant rubber wire for outdoor small power tools. |
UL & CSA certified cables cover all mainstream wiring scenarios for the US and Canadian markets, including residential/commercial fixed wiring, appliance internal wiring, industrial flexible power cords, municipal infrastructure, renewable energy, medical, automotive and telecommunication equipment. All products meet strict North American electrical safety standards for indoor, outdoor, underground and harsh industrial environments.
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FAQ
Find quick answers to common questions below.
Underwriters Laboratories (UL) is a North American multinational dedicated to safety and product certification. It is recognised for its participation in the adoption of electricity and the standardisation of safety rules for electrical devices and components.
UL’s evaluation process includes the inspection of the production process, the analysis of the available documentation and its respective certifications, the study of the test methods and the inspection of the storage process of the produced or imported material. This evaluation takes as a reference the requirements set out in the different sector regulations.
The many UL standards on the market can be divided into two types.
The UL Listed Mark includes products that have passed all the respective safety and performance tests that comply with UL standards. As a general rule, these are finished products that are ready for installation.
The UL recognised component, on the other hand, groups together those elements that will form part of a final product, and which generally have less stringent requirements than the previous case.
Safety in Electrical Installations: UL certification verifies that cables meet robust standards, minimizing the risk of electrical fires, equipment damage, and personal injury.
Regulatory Compliance: Many building codes and local regulations require UL-certified cables. Using such products helps avoid legal complications, penalties, and potential liability issues.
Meeting Customer Expectations: UL certification is often a selling point, signaling that a product is well-tested and reliable. Whether you’re a homeowner or a contractor, UL-certified cables support confidence and trust in the performance of electrical systems.
To select a suitable UL cable, follow these key steps:
Confirm the application category and corresponding UL certification standard.
Match rated voltage and conductor AWG size based on load current.
Pick insulation material according to ambient temperature, moisture, oil and UV exposure.
Choose rigid single wire for fixed installation or flexible rubber cord for movable equipment.
Ensure full compliance with US NEC electrical safety codes before final selection.
What are the advantages of using UL cables?
Can I use a UL cable in a CSA-certified application?
Are there any environmental factors to consider when choosing a UL cable?
Pass strict safety tests to prevent fire and electric shock risks;
Unified standard specifications simplify wire selection for all applications;
Full product series adapts to high temperature, water, oil and outdoor UV environments;
Valid certification for US & Canadian market sales and project acceptance;
Matches NEC codes and all mainstream electrical equipment designs;
Durable raw materials extend service life and cut maintenance costs;
Complete certification documents support insurance and liability identification.
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