What is SIS Wire?
- Conductor: Stranded copper for enhanced flexibility
- Insulation: Cross-linked polyethylene (XLPE)
- Voltage Rating: 600V
- Temperature Rating: 90°C in dry locations
- Standards Compliance: UL 44 with VW-1 flame test certification
What is SIS Cable Used For?
- Switchboards and panelboards
- Control panels and motor control centers
- Instrumentation and automation systems
- Important Note: Suitable for dry locations only, within protective enclosures
What is XHHW-2 Wire?
- Conductor: Copper or aluminum
- Insulation: XLPE material
- Voltage Rating: 600V
- Temperature Rating: 90°C in both dry and wet locations
- Standards Compliance: UL 44 and UL 1277
What is XHHW-2 Wire Used For?
- Commercial and industrial building wiring
- Conduit and cable tray installations
- Wet locations and direct burial applications
- Service entrance conductors
Key Differences: SIS vs XHHW-2 Wire
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When to Use SIS Wire vs XHHW-2 Wire
- Wiring inside switchgear, panelboards, or control cabinets
- Project specifications require UL 44 compliant SIS wire
- Maximum flexibility is needed for tight panel spaces
- Application is in dry locations only
- General building wiring is required
- Wet location rating is necessary
- Cost-effectiveness is a priority
- Versatility for various installation methods is needed
