---
product_id: 60564012
title: "IronBox Electric NEMA 5-20P to 5-20R Extension Cord - 20A, 125V, 12/3 SJT Jacket - Heavy Duty Outdoor Generator Cords & Plugs - UL Listed Extension Cable for Data Centers, Camper & More (3ft, Molded)"
brand: "iron box"
price: "¥10754"
currency: JPY
in_stock: true
url: https://www.desertcart.jp/products/60564012-ironbox-electric-nema-5-20p-to-5-20r-extension-cord
store_origin: JP
region: Japan
---

# 20A high power capacity Weather-resistant outdoor use Heavy-duty rugged design IronBox Electric NEMA 5-20P to 5-20R Extension Cord - 20A, 125V, 12/3 SJT Jacket - Heavy Duty Outdoor Generator Cords & Plugs - UL Listed Extension Cable for Data Centers, Camper & More (3ft, Molded)

**Brand:** iron box
**Price:** ¥10754
**Availability:** ✅ In Stock

## Summary

> ⚡ Power your hustle, rain or shine!

## Quick Answers

- **What is this?** IronBox Electric NEMA 5-20P to 5-20R Extension Cord - 20A, 125V, 12/3 SJT Jacket - Heavy Duty Outdoor Generator Cords & Plugs - UL Listed Extension Cable for Data Centers, Camper & More (3ft, Molded) by iron box
- **How much does it cost?** ¥10754 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/60564012-ironbox-electric-nema-5-20p-to-5-20r-extension-cord)

## Best For

- iron box enthusiasts

## Why This Product

- Trusted iron box brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Power Up Without Limits:** Delivers a robust 20 amps at 125V for seamless energy flow to your tools and devices.
- • **Plug & Play Compatibility:** Works flawlessly with generators, transfer switches, and data centers—your all-in-one power solution.
- • **Built to Brave the Elements:** Rugged 12/3 SJT jacket withstands impacts, harsh weather, and outdoor conditions with ease.
- • **UL Listed for Ultimate Safety:** Rigorous testing ensures dependable, safe power delivery you can trust every time.
- • **Versatile Lengths for Every Task:** Available in multiple sizes, perfect for indoor setups or outdoor projects requiring flexibility.

## Overview

The IronBox Electric NEMA 5-20P to 5-20R Extension Cord is a UL-listed, heavy-duty 3ft cable rated for 20 amps and 125 volts. Featuring a durable 12/3 SJT jacket and copper wiring, it’s engineered for reliable indoor and outdoor use, making it ideal for generators, data centers, and construction sites where consistent, safe power is non-negotiable.

## Description

IronBox Electric NEMA 5-20P to 5-20R Extension Cord - 20A, 125V, 12/3 SJT Jacket - Heavy Duty Outdoor Generator Cords & Plugs - UL Listed Extension Cable for Data Centers, Camper & More (3ft, Molded)

## Features

- DURABLE DESIGN: The IronBox Electric NEMA 5-20P to 5-20R Extension Cord is built to withstand tough conditions. Its rugged construction offers reliable protection against impacts and harsh weather, making it suitable for both indoor and outdoor use. This extension cord ensures long-lasting performance and dependability for all your power needs.
- HIGH POWER CAPACITY: Rated for 20 amps and 125V, this extension cord delivers robust and consistent energy flow to your equipment. Whether you're connecting to a generator or powering tools on a construction site, the IronBox Electric NEMA 5-20P to 5-20R Extension Cord ensures optimal performance. Its components resist heat rise and provide excellent conductivity, making it a crucial addition to your power setup.
- MULTIPLE LENGTH OPTIONS: This extension cord is available in various lengths to meet your specific requirements. Whether you need a shorter cable for indoor use or a longer extension for outdoor applications, we have you covered. Each cord is constructed with durable 12/3 AWG wire, which can be buried directly in the ground, providing flexibility and convenience for any project.
- EXCELLENT QUALITY: This extension cord is UL listed and has undergone rigorous testing for voltage hi-potential, continuity, and polarity. These comprehensive tests ensure safety and dependable performance. Whether you're using it indoors or outdoors, you can count on it to deliver consistent and dependable power.
- UNIVERSAL COMPATIBILITY: The IronBox Electric NEMA 5-20P to 5-20R Extension Cord is designed for broad compatibility. It works seamlessly with generators equipped with a 5-20 receptacle and is ideal for a wide range of applications, including transfer switches, data centers, and other high-powered uses. From construction sites to outdoor events, this versatile extension cord ensures you have the power you need, wherever you need it, making it an essential part of your power toolkit.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | Iron Box |
| Part Number | IBX-1010 |
| Item Weight | 8.8 ounces |
| Product Dimensions | 36 x 2.4 x 2.4 inches |
| Item model number | IBX-1010 |
| Is Discontinued By Manufacturer | No |
| Size | 3 ft |
| Color | Molded |
| Material | copper |
| Voltage | 125 Volts |
| Wattage | 1875 watts |
| Amperage Capacity | 20 Amps |
| Maximum Power | 1875 Watts |
| Item Package Quantity | 1 |
| Plug Format | Type B |
| Batteries Included? | No |
| Batteries Required? | No |

## Product Details

- **Color:** Molded
- **Brand:** Iron Box
- **Connector Gender:** Male-to-Female
- **Voltage:** 125 Volts
- **Plug Format:** Type B

## Images

![IronBox Electric NEMA 5-20P to 5-20R Extension Cord - 20A, 125V, 12/3 SJT Jacket - Heavy Duty Outdoor Generator Cords & Plugs - UL Listed Extension Cable for Data Centers, Camper & More (3ft, Molded) - Image 1](https://m.media-amazon.com/images/I/71RBvbblJZL.jpg)
![IronBox Electric NEMA 5-20P to 5-20R Extension Cord - 20A, 125V, 12/3 SJT Jacket - Heavy Duty Outdoor Generator Cords & Plugs - UL Listed Extension Cable for Data Centers, Camper & More (3ft, Molded) - Image 2](https://m.media-amazon.com/images/I/71UCAOlS8XL.jpg)
![IronBox Electric NEMA 5-20P to 5-20R Extension Cord - 20A, 125V, 12/3 SJT Jacket - Heavy Duty Outdoor Generator Cords & Plugs - UL Listed Extension Cable for Data Centers, Camper & More (3ft, Molded) - Image 3](https://m.media-amazon.com/images/I/71esbv+pR6L.jpg)
![IronBox Electric NEMA 5-20P to 5-20R Extension Cord - 20A, 125V, 12/3 SJT Jacket - Heavy Duty Outdoor Generator Cords & Plugs - UL Listed Extension Cable for Data Centers, Camper & More (3ft, Molded) - Image 4](https://m.media-amazon.com/images/I/71okgOyaCkL.jpg)
![IronBox Electric NEMA 5-20P to 5-20R Extension Cord - 20A, 125V, 12/3 SJT Jacket - Heavy Duty Outdoor Generator Cords & Plugs - UL Listed Extension Cable for Data Centers, Camper & More (3ft, Molded) - Image 5](https://m.media-amazon.com/images/I/81tncyprR4L.jpg)

## Available Options

This product comes in different **Color, Size** options.

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-02-25*