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Ningbo Factory · China Manufacturing

Kingsun Ningbo Factory
20+ Years of Manufacturing Excellence

Ningbo, China headquarters with full R&D and quality control capabilities.
UL / ETL / CSA certified · OEM/ODM partner for North American & European buyers.

Vietnam Factory · Zero Tariff to USA

Kingsun Vietnam Factory
Your Tariff-Free Partner

18,000 m² factory in Vietnam ships to the USA with 0% import tariff.
ISO 9001 certified · 8 production lines · Save 25%+ on landed costs.

Heavy-Duty Extension Cords

Built for the Toughest
Job Sites

SJTW outdoor extension cords with weather-resistant jacket.
UL Listed · 12/3 AWG · 50ft / 100ft · Custom lengths available.

Power Cords & Cables

Powering Data Centers
Across North America

SPT / SJT / SJTW power cords for servers, appliances, and industrial equipment.
UL / CSA certified · 16–12 AWG · Custom configurations.

Dual Factory · China & Vietnam

18,000 m² Vietnam Factory
Zero Tariff to USA

Our Vietnam factory ships directly to the USA with 0% import tariff.
Save 25%+ on landed costs. 8 automated production lines. ISO 9001 certified.

NMD90 Building Wire

CSA Certified NMD90
for Canadian Construction

Copper NMD90 building wire for residential and commercial projects.
CSA C22.2 certified · 14–6 AWG · Meets all Canadian electrical codes.









20+Years Experience
18,000m²Vietnam Factory
8Production Lines
0%Tariff VN→USA

UL / ETL / CSA Certified Cable Solutions

From power cords to building wire — manufactured in our dual factories in China and Vietnam, certified for North American and Canadian markets.

SJTW Power Cord

UL Listed
ETL

Power Cords

SJTW / SPT power cords for appliances, tools & industrial use. UL/CSA certified, 16–12 AWG.

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SJTW Extension Cord

UL Listed

Extension Cords

Heavy-duty SJTW outdoor extension cords. Weather-resistant, 12/3 AWG, 50ft–100ft custom lengths.

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Trailer Wire Harness

SAE J1128

Trailer Wire Harness

7-way trailer wire harness for RV, truck & towing. SAE J1128 compliant, PVC/GPT insulation.

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NMD90 Building Wire

CSA

NMD90 Building Wire

CSA certified NMD90 copper building wire for Canadian residential & commercial construction. 14–6 AWG.

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Power Strip

ETL

Power Strips

ETL listed power strips with surge protection. 6–12 outlets, 3ft–6ft cord, custom configurations.

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Your Competitive Advantage Starts Here

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Dual Factory Advantage

Ningbo China factory for R&D and quality control. 18,000 m² Vietnam factory for cost-competitive production with 0% US tariff.

Full Certifications

UL Listed, ETL Certified, CSA Approved, ISO 9001:2015, BSCI audited. All major North American safety standards covered.

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0% Tariff from Vietnam

Vietnam-origin products ship to the USA with zero import tariff. Save 25%+ on landed costs vs. China-origin competitors.

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OEM / ODM Capability

Custom cable lengths, colors, packaging, and private labeling. 8 automated production lines with 20+ years of OEM experience.

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Fast Lead Times

Standard orders ship in 25–35 days. Stocked items available for quick dispatch. FOB Ningbo or Ho Chi Minh City.

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Strict Quality Control

100% electrical testing on every unit. In-house lab with conductor resistance, insulation resistance, and voltage withstand tests.

18,000 m² State-of-the-Art Manufacturing

Located in Tan Duc Industrial Park, Long An Province, Vietnam — our purpose-built factory features 8 automated production lines, a dedicated QC lab, and direct access to major shipping routes to North America.

  • ✔ 18,000 m² total floor area
  • ✔ 8 fully automated production lines
  • ✔ ISO 9001:2015 certified quality system
  • ✔ BSCI social compliance audited
  • ✔ 0% import tariff to USA
  • ✔ 200+ skilled workers

Learn More About Us

Kingsun Vietnam Factory

Certified for North American & International Markets

Every product we manufacture meets rigorous third-party safety and quality standards. Click any certificate to view the full document.

ETL Certificate

ETL Listed
Intertek — Power Supply Cords

UL Certificate

UL Listed
UL International — Wire & Cable

ISO 9001 Certificate

ISO 9001:2015
TQC Vietnam — Quality Management

BSCI Certificate

BSCI / amfori
Bureau Veritas — Social Compliance

Ready to Source from a Certified Manufacturer?

Get a competitive quote within 24 hours. OEM/ODM welcome. Minimum order quantities flexible.