What is SIS Wire?
- Conductor: Stranded copper conductors for enhanced flexibility
- Insulation: Cross-linked polyethylene (XLPE) insulation
- Voltage Rating: 600 volts
- Temperature Rating: 90°C in dry locations
- Standards Compliance: UL 44 standard with VW-1 flame test certification
- Primary Characteristic: Optimized for switchboard and panelboard applications
What is SIS Cable Used For?
- Industrial switchboards and panelboards
- Control panels and motor control centers (MCCs)
- Instrumentation and automation systems
- Electrical equipment internal wiring
- Important Note: Suitable for dry locations only, within protective enclosures
What is RHW-2 Wire?
- Conductor: Copper or aluminum conductors
- Insulation: Thermoset polymer insulation (typically XLPE or EPR)
- Voltage Rating: 600 volts
- Temperature Rating: 90°C in both dry and wet locations
- Standards Compliance: UL 44 and UL 83 standards
- Key Advantage: Excellent moisture and heat resistance
What is RHW-2 Wire Used For?
- Service entrance conductors
- Feeder and branch circuit wiring
- Wet locations and direct burial applications
- Conduit and cable tray installations
- Commercial and industrial power distribution
- Underground installations
Detailed Comparison: SIS vs RHW-2 Wire
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When to Choose SIS Wire vs RHW-2 Wire
- Wiring inside switchgear, panelboards, or control cabinets
- Project specifications require UL 44 compliant wire
- Maximum flexibility is needed for tight panel spaces
- Application is exclusively in dry locations
- Working with control circuits and instrumentation
- Priority is panel-friendly installation characteristics
- General building wiring is required
- Wet location rating is necessary
- Direct burial or underground installation is needed
- Cost-effectiveness is a priority
- Versatility for various installation methods is required
- Service entrance or feeder applications
Conclusion: Making the Right Choice
- SIS wire excels in its specialized role as internal wiring for electrical equipment enclosures, offering superior flexibility and performance in controlled environments.
- RHW-2 wire provides versatile, robust performance for general building wiring applications, particularly where moisture resistance or outdoor installation is required.
