Zhejiang Zhongjing Wire & Cable Co., Ltd proudly presents SPT-3, a high-performance Standard Parallel Thermoplastic Cable designed for heavy-duty indoor applications. Compared with SPT-1 and SPT-2, SPT-3 offers even thicker insulation and greater current-carrying capacity, making it ideal for powering household appliances, HVAC systems, power tools, and lighting.
The SPT-3 cable features two or more parallel copper conductors, fully insulated with robust PVC thermoplastic, providing long-term electrical stability, superior flexibility, and resistance to mechanical damage. Its heavier insulation allows for higher voltage use while maintaining safety and performance. SPT-3 parallel wire meets UL, CSA, and RoHS standards, ensuring both quality and global compliance.
Product Specifications
|
SPT-3 |
Heavy-Duty Parallel Thermoplastic Cable |
|
Conductor Material |
Stranded bare copper |
|
Size Range |
18, 16, 14, 12, and 10 - gauge conductors |
|
Number of Conductors |
2 or 3 parallel conductors |
|
Insulation Material |
PVC (Polyvinyl Chloride), thicker than SPT-1 & SPT-2 |
|
Voltage Rating |
300 Volts |
|
Temperature Rating |
-20°C to +105°C |
|
Standard Compliance |
UL 62, CSA C22.2 No. 49, RoHS compliant |
|
Flame Retardant |
Yes (meets UL FT2 flame test requirements) |
|
Jacket Type |
arallel thermoplastic PVC insulation |
|
Application |
Medium-duty appliances, HVAC, power tools, lighting, office equipment |
|
Color Options |
Black, White, Transparent, or Custom |
Customization Options
We offer full customization to meet your project or OEM needs:
- Conductor size: 18 AWG – 10 AWG
- Number of cores: 2 or 3 parallel conductors
- Insulation material: PVC or optional rubber
- Colors: Black, white, red, or custom colors
- Printing & striping: Available upon request
- Packaging: Coils, spools, or custom cartons

Product Application
SPT-3 is ideal for a variety of indoor and semi-industrial applications where flexibility and higher power capacity are required:
- Large household appliances (air conditioners, refrigerators)
- Power tools and heavy-duty workshop equipment
- HVAC systems
- Lighting fixtures and lamps
- Office and commercial power connections
It is a more durable alternative to SPT-1, offering better performance for demanding environments.
Technical Data
|
lItem |
AWG |
No.of Cores |
Nominal Section (mm²) |
No./Dia of Conductor (mm) |
Insulation Thickness (mm) |
Overall Diameter (mm) |
|
SPT-3 |
18 |
2C |
0.823 |
47/0.15 |
1.52 |
4.45X8.75 |
|
16 |
2C |
1.309 |
74/0.15 |
1.52 |
4.75X9.35 |
|
|
14 |
2C |
2.801 |
60/0.21 |
2.03 |
6.15X11.15 |
|
|
12 |
2C |
3.309 |
58/0.27 |
2.41 |
7.4X12.90 |
|
|
10 |
2C |
5.261 |
80/0.29 |
2.79 |
8.8X14.90 |
Quality Control & Certifications
All SPT-3 cables undergo strict quality inspection:
- 100% electrical conductivity testing
- Insulation resistance and durability checks
- Conformity to UL, CSA, RoHS standards
- Factory ISO 9001:2015 certification
We ensure consistent quality in every batch.
Packaging & Logistics
We pack our SPT-3 wires securely using:
- Plastic reels or wooden spools
- Labeled boxes or shrink-wrapped pallets
- Custom OEM packaging available
- Fast and reliable global shipping via sea, air, or express
After-Sales Service
Zhejiang Zhongjing Wire & Cable Co., Ltd provides:
- Technical support for installation and use
- Prompt response to any quality issues
- Replacement or refund for verified defects
- Long-term cooperation and service guarantees


FAQ
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