NEMA L14-20 Generator Extension Cord, 12/4 AWG 20 Amp 125/250V Twist Lock Power Cord, SJTW ETL Listed, L14-20P to L14-20R Heavy Duty Cable for Generator, Transfer Switch & Backup Power
Heavy Duty 12/4 AWG Pure Copper Conductors
Built with 12/4 AWG pure copper wire, engineered for stable current flow and reduced voltage drop during high-load operation. Rated for 20A / 125/250V / 5000W, ideal for portable generators, transfer switches, and emergency backup power systems.
Industry-standard L14-20 generator cords also commonly use 12/4 AWG copper conductors for 20A circuits.
Secure NEMA L14-20 Twist Lock Connection
Features NEMA L14-20P male plug to L14-20R female connector with a 4-prong twist-lock design that helps prevent accidental unplugging caused by vibration, movement, or outdoor operation.
ETL Listed for Reliable Safety
Certified to meet recognized ETL safety standards, ensuring dependable performance for residential, contractor, and emergency backup applications.
Multiple Length Options for Different Power Setups
Choose the right cord length for your installation:
- 10FT — Ideal for close generator-to-inlet connections
- 25FT — Great for garage, workshop, and outdoor generator setups
- 50FT — Perfect for backyard backup power installations
- 100FT — Designed for long-distance generator connections and jobsite applications
Perfect for Multiple Applications
- Portable generators
- Home transfer switches
- Backup power systems
- Emergency storm preparation
- Construction sites
- Industrial temporary power
Generator communities also regularly emphasize matching plug type + amp rating + voltage when choosing generator cords.
USA: Free standard shipping on orders over $30. Orders under $30 ship for a flat $4.99. All items ship directly from our US warehouse in 1–3 business days.
Other countries: Please contact our support team at support@plugtul.com for a custom shipping quote before placing your order.
We accept returns within 30 days of delivery for items that are unused, and in their original packaging with tags intact.
Non-returnable items:
- Counterfeit product
- Purchased from unauthorized retailer
- Custom products (such as special orders or personalized items).
- On sale items or gift cards.
We do not charge a transaction fee for returns, but return shipping costs for non-merchandise quality issues are the responsibility of the customer.
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Frequently asked questions
Absolutely. For wholesale pricing, please send your item details and quantities to support@plugtul.com. We'll be happy to provide discount information within 48 hours.
We are pleased to offer customized solutions. Please email your specific requirements—including product specifications, your country, and estimated quantity—to support@plugtul.com. Our customization team will contact you within 48 hours to discuss technical details and provide a quotation.