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IronBox Electric - Heavy-Duty 5-15P to C13 Power Cord - 3 Prong 15A 125V 14/3 SJT PC Cable - Cord for Computer, Monitor, Subwoofer, Amplifier - Cable for Power Supply - (Black 3 Foot)
Iron Box

IronBox Electric

Bottom line: The IronBox Electric ($7.99 on Amazon as of 2026-10-20 22:22 UTC): 14/3 SJT cable: 14-gauge conductors, heavier than many bundled PC cords; main trade-off: 3 ft is too short to reach distant wall outlets or floor power strips.

$7.99

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Buy on Amazon — $7.99 Compare to similar power supplies & cables

By , Founder & Editor-in-Chief · Listing data updated

Mike Perry — Hardware researcher since 2014. For retro PC hardware and period-correct parts, synthesises manufacturer documentation, community compatibility lists and marketplace listings rather than first-hand lab testing. Core beat: GPU performance across gaming, rendering, and local-LLM inference.

*Price sourced from Amazon.com. Last updated 2026-10-20. Price and availability subject to change.

Pros & Cons

Pros

  • ✓ 14/3 SJT cable: 14-gauge conductors, heavier than many bundled PC cords
  • ✓ Rated 15A at 125V, with headroom for high-wattage PC power supplies and amps
  • ✓ UL Listed power cord
  • ✓ IEC C13 end fits most PC PSUs, monitors, TVs, projectors and subwoofers
  • ✓ 3 ft length keeps short desk and rack runs free of coiled slack

Cons

  • ✗ 3 ft is too short to reach distant wall outlets or floor power strips
  • ✗ 5-15P plug is for North American 125V outlets only
  • ✗ C13 end won't fit C15, C5 or C7 inlets on some appliances and laptop bricks
  • ✗ Heavier 14-gauge jacket is stiffer to route through tight cable management

Manufacturer description

The IronBox Electric 5-15P to C13 power cord replaces the lost or too-short cable behind your desk. One end is a standard 3-prong NEMA 5-15P wall plug. The other is the IEC C13 connector used on most desktop power supplies, monitors, projectors, TVs, subwoofers and amplifiers. The cable is 14/3 SJT, which means three 14-gauge conductors inside a thermoplastic jacket. It is rated 15A at 125V and is UL Listed. Many cords bundled with monitors and PCs use thinner wire, so this heavier gauge is a sensible choice for a high-wattage gaming power supply or a power amplifier. The black cord is 3…

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SpecPicks Verdict

SpecPicks scored IronBox Electric using a rating × review-volume × price-fit model applied to published specs and reviews across the power supplies & cables category. Iron Box's power supplies & cables lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.

Common buyer scenarios for power supplies & cables of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.

Frequently Asked Questions

Will this cord fit my desktop PC power supply?

Yes, if your power supply has the standard 3-pin IEC C14 inlet, which most desktop ATX power supplies use. The C13 end of this cord plugs into that inlet, and the 5-15P end goes into a standard North American 3-prong outlet.

What gauge is this power cord, and why does it matter?

It is 14/3 SJT, meaning three 14-gauge conductors in a thermoplastic jacket, rated 15A at 125V. Many cords bundled with monitors and PCs use thinner wire, so this heavier gauge suits high-draw gear like gaming power supplies and amplifiers.

How long is the IronBox C13 cord?

This version is 3 feet long and black. That fits short runs such as a PC next to a power strip or an amplifier in a rack. Measure the distance to your outlet first, because 3 feet leaves little slack.

Can I use this cord with a monitor, TV, or subwoofer?

Yes, as long as the device has a C14 inlet (the three-pin rectangular socket). The listing names computers, monitors, TVs, projectors, speakers, subwoofers and amplifiers as compatible. It will not fit two-prong figure-8 (C7) or cloverleaf (C5) inlets.

Is this power cord safety certified, and does it come with a warranty?

The cord is UL Listed and rated 15A at 125V. For current warranty terms, check the product listing or contact IronBox Electric directly.

Key Features

  • ROBUST CONSTRUCTION, VERSATILE USAGE: Experience the durability of a heavy-duty 5-15P to C13 Power Cord, featuring a 3-prong, 15A, 125V design suitable for computers, monitors, subwoofers, amplifiers, and more. The UL Listed cable ensures reliable power supply.
  • SEAMLESS COMPATIBILITY: This power cord is compatible with a variety of devices, including computers, TVs, projectors, desktops, and speakers. The 5-15P plug to C13 connection provides versatile compatibility, making it an ideal solution for both home and office setups.
  • DURABLE DESIGN FOR LONG-LASTING PERFORMANCE: Invest in a power cord built for longevity. The robust construction ensures durability, providing a reliable and lasting solution for your power needs. Count on this power cord to withstand daily wear and tear.
  • RELIABLE CONNECTIVITY FOR CRITICAL APPLICATIONS: The 3-prong, 15A, 125V power cable ensures a stable and secure connection, crucial for computers, monitors, and amplifiers. The high-quality conductor and SJT cable construction guarantee a reliable power supply.
  • ENHANCED SAFETY FEATURES : This power cord is UL Listed, meeting rigorous industry standards for safety. The built-in features ensure protection against electrical hazards. Invest in peace of mind with a power cord designed with your safety as a top priority.

Full Specifications

BrandIron Box
ColorBlack
Gauge14
Voltage125 volts
Amperage15 A
Plug TypeType B
Unit Count1 Count
Item Length3 feet
Plug FormatType B
Model NumberIBX-4910
CompatibilityPC
Input Current15 A
Mfr Part NumberIBX-4910
Connector GenderMale-to-Female
Power Cord Prong Count3
Full listing titleIronBox Electric - Heavy-Duty 5-15P to C13 Power Cord - 3 Prong 15A 125V 14/3 SJT PC Cable - Cord for Computer, Monitor, Subwoofer, Amplifier - Cable for Power Supply - (Black 3 Foot)

Ready to buy?

IronBox Electric - Heavy-Duty 5-15P to C13 Power Cord - 3 Prong 15A 125V 14/3 SJT PC Cable - Cord for Computer, Monitor, Subwoofer, Amplifier - Cable for Power Supply - (Black 3 Foot) is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

Buy on Amazon — $7.99

*Price sourced from Amazon.com. Last updated 2026-10-20. Price and availability subject to change.

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IronBox Electric - Heavy-Duty 5-15P to C13 Power Cord - 3 Prong 15A 125V 14/3 SJT PC Cable - Cord for Computer, Monitor, Subwoofer, Amplifier - Cable for Power Supply - (Black 3 Foot)
$7.99
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