Desktop PC Power Cord: How to Choose the Right C13 Cable
Quick answer / TL;DR: Most desktop PCs take a C13 power cord that mates with the C14 inlet on the case rear. For a typical desktop, a 2 m, 13 AWG cord with a safety mark (UL, ETL or VDE) is the safe default; put surge protection at the outlet side, not inside the cord.
Most searches for desktop pc power cord come down to one thing: the three-prong lead that feeds a tower from the wall. Desktop PCs almost universally use the C13/C14 pair – a C13 plug at the cable end mating with a C14 inlet molded into the case rear panel. Choosing the right cord means checking the inlet, the length and the gauge, and deciding whether surge protection belongs in the cord or at the outlet.
This guide covers the connector standard, the lengths that make sense for home and office desks, the AWG gauge question, and the certification marks that separate a safe cord from a hazard. Everything below applies to IEC 60320-family cords sold in most markets.
The Standard Connector: C13 Plug into a C14 Inlet
The C13/C14 pair is defined by IEC 60320. The C14 inlet is the opening on the back of the case, usually right next to the PSU rocker switch. The matching C13 plug carries two flat current-carrying pins and a round earth pin. If the case inlet looks like a smaller, rounded trapezoid, it is a C6 (MIDI) inlet and needs a C5 plug cord instead – but that is a minority of desktops, since most prebuilts and DIY towers use C14.
How to identify the inlet
- C14: rectangular opening with three angled slots
- C6 (MIDI): smaller, rounded trapezoid, also three slots
- Barrel: round DC jack, mostly on all-in-one PCs and some low-power cases
If the existing cord still works, the fastest check is to look at its plug: a wide three-blade C13 means any C13 cord will replace it.
Choosing the Right Length
| Typical desk setup | Recommended cord length |
|---|
| Outlet directly behind the desk | 1.8 m (6 ft) |
| Outlet on a side wall | 2 m (6.5 ft) |
| Under-desk cable tray or floor outlet | 2 m (6.5 ft) |
| Outlet in the opposite corner | 3 m (10 ft) |
| Server closet or remote run | 3 m (10 ft), no daisy-chaining |
Length and gauge
Longer cords carry more resistance, which is why cords above 2 m are usually built with 13 AWG conductors while short 1.8 m cords are often 16 AWG. For a desktop pulling 150-600 W, either gauge handles the load comfortably; the practical differences are flexibility, how the cord drapes on the desk, and margin for a full gaming build.
Surge Protection and Safety Marks
Cord surge vs outlet surge
Surge protection built into the cord exists, but the more common and usually better approach is a surge-protected power strip or outlet protector, because it protects the monitor and peripherals on the same circuit too. Plug the computer into the surge device, and the surge device into the wall – never chain two surge devices, and never feed one from a dimmer-controlled outlet.
Check the cord for a safety mark – UL, ETL or VDE on the jacket or plug – and a current rating of at least 10 A. Avoid unmarked cords with loose plugs: a C13 plug that wobbles in the C14 inlet is an arcing risk, and the earth pin must stay straight for the chassis ground to work.
Real-World Applications
Home office: a 2 m 13 AWG C13 cord plus a four-outlet surge strip covers the PC, monitor and router. Small business: one 3 m cord per workstation, all feeding from a single PDU or surge strip for cleaner cable management. Refurbished or used PC: the cord is the first item to replace, because used cords often carry cracked jackets or a deformed C13 plug.
C13 desktop power cords are stocked in 1.8 m, 2 m and 3 m with 13 AWG conductors and regional safety marks; the product catalog lists the exact part numbers by region.
Related reading: Internal side: the PSU cables that feed the motherboard and GPU — power-cables-in-computer
Related reading: The case inlet side: reading and servicing a C14 power receptacle — pc-power-receptacle
Frequently Asked Questions
What power cord does a desktop PC use?
Almost all tower desktops use a C13 power cord that plugs into the C14 inlet on the back of the case. All-in-one PCs and some low-power units use a smaller C5 (MIDI) cord or a DC barrel connector instead, so check the inlet before buying a replacement.
Can I use a monitor power cord for my computer?
Usually yes, if both are the C13 type, which is the common case – a monitor cord is the same IEC 60320 standard with the same 10 A rating. Just confirm the length reaches from the PC position to the outlet, since monitor cords are sometimes shorter than a tower run needs.
Is 16 AWG or 13 AWG better for a PC power cord?
For desktop loads under about 600 W both gauges are electrically fine at typical desk lengths. 13 AWG is the safer general pick because it is thicker, handles 3 m runs and coiled cords better, and keeps voltage drop minimal. Reserve 16 AWG for short runs on low-draw peripherals.
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