1. What is SIS Cable?
SIS stands for Switchboard Instrumentation Service. An SIS type wire is a single-conductor electrical wire specifically designed for switchboards, control systems, and panel boards. SIS wire typically features a solid or stranded bare copper conductor with heat-resistant, cross-linked polyethylene (XLP) insulation.
SIS Cable Structure and Specifications:
Conductor: Bare copper, compliant with ASTM B3 or B8
Insulation: Cross-linked polyethylene (XLP), UL 44 rated
Voltage Rating: 600V
Temperature Range: Commonly from -20°C to 90°C, some up to 105°C
Flame Retardancy: Meets VW-1 or FT1 flame test
This makes SIS cable ideal for confined and high-temperature environments such as control cabinets and electrical panels.
2. The Most Versatile Mid-Sized Wire
Among the various SIS wire sizes, sis wire 14 AWG is one of the most widely used. It strikes a balance between current capacity and flexibility, making it ideal for wiring in control panels and building circuits.
Key Benefits of SIS Wire 14 AWG:
Optimal conductor size for control and branch circuits
Highly flexible and easy to route through panels
Durable insulation withstands high-heat enclosures
Common Use Cases:
Elevator control cabinets
Industrial automation wiring
Commercial building lighting controls
Bus bar jumpers in switchgear
Its versatility and thermal endurance make sis wire 14 AWG a popular choice for electricians and engineers alike.
3. SIS Control Wire
SIS control wire refers specifically to SIS cables used for transmitting control signals in electrical systems. These wires are vital to automation processes, ensuring reliable signal communication and system feedback.
Advantages of SIS Control Wire:
High dielectric strength for signal integrity
Stable over long operating periods
Resistant to abrasion and mechanical stress
Typical Applications:
Power plant control systems
Smart building device wiring
Temperature sensors in manufacturing
Chemical plant dosing control lines
SIS control wire supports complex systems where reliability and safety are non-negotiable.
4. Industrial & Commercial Uses of SIS Type Wire
SIS type wire is not limited to industrial control systems. Its high performance and flame resistance make it suitable for various commercial and infrastructure applications:
Primary Applications:
Switchboards and distribution panels
Motor control centers (MCCs)
Data centers and IT infrastructure wiring
OEM machine internal wiring
SIS wire's small diameter and flexibility make it easy to bundle, organize, and install within high-density electrical environments.
5. SIS Cable vs. Other Common Wire Types
SIS vs. THHN:
| Feature | SIS Cable | THHN Cable |
|---|---|---|
| Insulation Type | Cross-linked Poly | PVC/Nylon |
| Heat Resistance | Higher | Moderate |
| Flexibility | More flexible | Stiffer |
| Primary Use | Control panels | Conduit wiring |
SIS vs. XHHW:
SIS wire is more suitable for internal control wiring, while XHHW is preferred for feeders and outdoor circuits due to its moisture resistance.
6. Standards and Compliance for SIS Type Wire
To ensure safety and compatibility, SIS type wire typically complies with the following standards:
UL 44: Cross-linked polyethylene insulation standard
NEC compliant: Meets National Electrical Code guidelines
RoHS compliant: Lead-free and environmentally safe
CSA certified: Approved for the Canadian market
Always verify certification markings on cables before installation.
7. SIS Cable Installation Guidelines
Despite its robust construction, proper installation ensures safety and longevity:
Use only in dry environments
Avoid routing near electromagnetic interference sources
Label wire colors or numbers for easy maintenance
Use cable ties or ducting to secure and organize
8. How to Choose the Right SIS Wire 14 AWG and Other Sizes
When purchasing SIS type wire, consider the following factors:
Voltage and current requirements
UL/CSA certification for safety compliance
Color coding or numbering options for panel organization
Availability and delivery from trusted vendors
Buyers should consult reputable industrial cable distributors to ensure quality and timely supply.
Dongguan Greater Wire & Cable Co., Ltd. has accumulated successful experience in various countries in the Americas and can quickly adapt to different certification systems and technical parameters. We welcome your consultation and cooperation needs at any time and look forward to becoming your long-term trusted cable supply partner.