1. Understanding R90 Cable: Basic Definition
The term "R90" refers to the insulation rating of the cable. "R" stands for rubber-based insulation, and "90" indicates that the cable is rated for continuous operation at 90°C. R90 cable is typically manufactured to meet CSA standards such as C22.2 No. 38 or No. 75, making it a common choice in indoor wiring, lighting circuits, and control applications.
R90 cables are available in various sizes ranging from smaller gauges to large conductors like R90 WIRE 1AWG and R90 WIRE 2AWG, depending on the required current capacity and system configuration.
2. R90 Cable Construction & Materials
R90 cable generally consists of the following components:
Conductor: Usually made of annealed copper, known for its excellent conductivity. Larger sizes, like R90 WIRE 1AWG or R90 WIRE 2AWG, often feature stranded copper to improve flexibility.
Insulation: Made from high-heat-resistant rubber or cross-linked polyethylene (XLPE). These materials provide strong thermal and electrical resistance.
Optional Outer Sheath: Some R90 cables come with an additional protective jacket for enhanced mechanical and chemical protection.
For example, R90 CABLE 6AWG is well-suited for mid-load equipment wiring, offering both safety and ease of installation.
3. Key Characteristics of R90 Cable
R90 cables are known for their reliable performance in demanding conditions:
High Temperature Resistance: Rated for continuous operation at 90°C, and short-term operation up to 105°C.
Voltage Rating: Typically 600V, which meets the needs of most residential and commercial systems.
Insulation Safety: Rubber or XLPE insulation ensures high resistance to electric leakage and mechanical stress.
Flame Retardance: Available with FT1 or FT4 flame ratings for enhanced fire safety.
Versatile Installation: Can be installed in conduits, cable trays, or moist environments.
Cables like R90 CABLE 6AWG are often used for commercial equipment feeds, while R90 WIRE 2AWG is ideal for higher-load main supply lines.
4. R90 Cable vs. RW90 / RWU90 / RW75
Here's a comparison of R90 cable with other common cable types:
| Feature | R90 Cable | RW90 Cable | RWU90 Cable | RW75 Cable |
|---|---|---|---|---|
| Temperature Rating | 90°C | 90°C | 90°C | 75°C |
| Insulation Type | Rubber or XLPE | XLPE | XLPE | PVC |
| Installation Use | Indoor, conduit | Indoor/Outdoor | Underground/Outdoor | Indoor, dry environments |
| Flame Rating | FT1 or FT4 (optional) | FT4 (optional) | FT4 (optional) | FT1 (optional) |
| Application | Lighting, control, branch circuits | Branch and main feeders | Subterranean, transformer feeds | General indoor wiring |
For instance, R90 WIRE 1AWG is better suited for control panels and distribution boards, while RWU90 1AWG is more appropriate for direct burial installations.
5. Typical Applications of R90 Cable
Thanks to its electrical and thermal properties, R90 cable is widely used in:
Residential Wiring: Power circuits, lighting systems, and outlets.
Commercial Distribution Systems: Branch feeders and control wires-especially R90 CABLE 6AWG and R90 WIRE 2AWG.
Industrial Automation: Power and signal wiring for machinery.
Data Centers: Reliable power supply in high-temperature, interference-prone environments.
Lighting Systems: Compact, flexible design simplifies complex lighting layouts.
6. Compliance and Certification
R90 cables must comply with several standards:
CSA Certified: Compliant with CSA C22.2 No. 38 or No. 75.
Flame Ratings: FT1 or FT4, depending on environment and code requirements.
Building Code Compliance: Meets Canadian Electrical Code (CEC) and other North American standards.
For example, R90 WIRE 1AWG and R90 WIRE 2AWG must meet specific regulations if used for main feeders in residential or commercial buildings.
Dongguan Greater Wire & Cable Co., Ltd. has more than 10 years of export experience and has successfully served more than 80 countries and regions. We are familiar with the technical standards of the North American and Latin American markets and provide high-quality cable products that meet UL and other certification requirements. Whether you are in the United States, Mexico or Venezuela, you can trust Greater's expertise and service. If you are looking for a stable and reliable cable supplier, please contact us now to start the first step of cooperation.