Quick Answer
Why Make Your Own Ethernet Cables?
Pre-made patch cables work fine for most people. But there are real reasons to make your own, and they go beyond saving a few dollars.
- Exact custom lengths. No more 10-foot cables connecting devices 2 feet apart. No more daisy-chaining short cables because you cannot find the right length. Custom cables mean clean cable management and less clutter.
- Bulk cable is cheap. A 1,000-foot box of Cat6 stranded cable costs roughly what 20 pre-made cables cost at retail. Once you own the tools, every additional cable costs about $0.50 to $1.00 in materials.
- Color coding. Buy bulk cable in multiple jacket colors and build a color-coded system: blue for workstations, red for servers, yellow for management, green for VoIP. You cannot do this with store-bought cables unless you buy exactly the right colors in exactly the right lengths.
- Emergency repairs. When a cable goes bad at 10 PM on a Sunday, the ability to cut a new one in five minutes is worth the entire cost of the toolkit.
- Quality control. Every cable you make gets tested before it goes into service. You know the wiring standard, the connector quality, and the crimp integrity because you verified it yourself.
What You Need
Making Ethernet cables requires a small set of tools and materials. Here is everything you need, with recommendations at each level.
Materials List
| Item | Details | Why It Matters |
|---|---|---|
| Stranded Ethernet cable | Cat5e or Cat6, stranded conductor, bulk spool | Stranded wire flexes without breaking. Solid wire is for permanent runs only. |
| RJ45 connectors | Pass-through (EZ-RJ45) style, matched to cable category | Pass-through design lets you verify wire order before crimping. Match Cat5e connectors to Cat5e cable, Cat6 to Cat6. |
| Strain relief boots | Snagless boots, color-matched if desired | Protects the connector base from bending stress and prevents snags during cable pulls. |
Tools
RJ45 Crimp Tool
A ratcheted crimp tool ensures a complete, consistent crimp every time. For pass-through connectors, choose a tool that automatically trims excess wire during the crimp cycle. This eliminates a separate trimming step and speeds up production.
RJ45 Connectors
Always match the connector to your cable category. Cat5e cable uses 24 AWG connectors. Cat6 uses 23 AWG. Using the wrong size causes loose contacts or damaged wires. Pass-through connectors are strongly recommended for making patch cables. See our pass-through vs standard comparison.
Cable Jacket Stripper
A dedicated cable stripper removes the outer jacket cleanly without nicking the wires inside. This is where most beginners accidentally damage conductors. A stripper with adjustable or preset blade depth prevents cutting too deep.
Cable Tester
A cable tester is not optional. It verifies that all eight conductors are wired correctly and that there are no opens, shorts, crossed wires, or split pairs. Test every cable you make, even if you have done thousands. A five-second test is cheaper than troubleshooting a network problem later.
Why Stranded Cable for Patch Cables
This is the single most important material choice when making patch cables, and it is the one that beginners most often get wrong.
Stranded cable has conductors made of multiple thin copper wires twisted together. This makes the cable flexible, resilient to repeated bending, and able to withstand the constant plugging and unplugging that patch cables experience. A stranded conductor can flex thousands of times without breaking.
Solid cable has a single thick copper wire per conductor. It is stiffer, easier to punch down into keystone jacks, and better for long permanent runs inside walls or ceilings. But solid conductors fatigue and break when flexed repeatedly, which is exactly what happens to patch cables.
For a deeper dive into the differences, see our full solid vs stranded cable connector guide.
Choosing the Right Connector
The connector you choose depends on two things: your cable category and your preferred termination style.
Match Connector to Cable Category
Cat5e cable uses 24 AWG conductors. Cat6 cable typically uses 23 AWG conductors. The internal channels in an RJ45 connector are sized for a specific wire gauge. A Cat5e connector on Cat6 cable will be too tight and may damage the wires. A Cat6 connector on Cat5e cable will be too loose and the contact blades may not make reliable contact. Always match the connector to your cable.
Pass-Through vs Standard Connectors
For making patch cables, pass-through (EZ-RJ45 style) connectors are the clear recommendation, especially for beginners. Here is why:
- Visual verification. Wires extend through the front of the connector so you can see every color before you crimp. No guessing, no holding the connector up to the light to check through clear plastic.
- Easier insertion. You do not need to cut wires to a precise pre-measured length before insertion. Push them through, verify, then crimp and trim in one step.
- Lower rework rate. Professionals who switch from standard to pass-through connectors consistently report 50% or more reduction in failed terminations.
For a complete comparison, read our pass-through vs standard RJ45 guide. And if you are wondering about the difference between EZ-RJ45 and ezEX connector lines, we cover that in our EZ-RJ45 vs ezEX comparison.
T568B Wire Color Order
For a straight-through patch cable (the standard type that connects a device to a switch, router, or wall jack), use the T568B wiring standard on both ends. T568B is the dominant standard in the United States and the one you should use unless your existing network specifically uses T568A.
Here is the pin-by-pin order with the connector clip facing down and the pins facing up, reading left to right:
| Pin | Wire Color | Pair | Function (10/100) |
|---|---|---|---|
| 1 | Orange-White | Pair 2 | TX+ |
| 2 | Orange | Pair 2 | TX- |
| 3 | Green-White | Pair 3 | RX+ |
| 4 | Blue | Pair 1 | Unused |
| 5 | Blue-White | Pair 1 | Unused |
| 6 | Green | Pair 3 | RX- |
| 7 | Brown-White | Pair 4 | Unused |
| 8 | Brown | Pair 4 | Unused |
All eight wires must be connected correctly even if your network only uses pairs 2 and 3 for data. Gigabit Ethernet and above use all four pairs. For the full pinout reference including T568A, see our complete RJ45 pinout guide.
Step-by-Step: How to Make an Ethernet Patch Cable
This guide uses stranded cable, EZ-RJ45 pass-through connectors, and the T568B wiring standard. This combination is the easiest and most reliable method for making patch cables. If you are new to cable termination, start here.
Measure and cut the cable to length
Decide how long the finished patch cable needs to be. Add 6 inches of extra length at each end to give yourself working room during termination. It is always better to have a cable that is slightly longer than you need than one that is slightly too short.
Use the cutter built into your crimp tool or a dedicated cable cutter to make a clean, square cut. A ragged cut makes jacket stripping more difficult.
Slide a strain relief boot onto the cable
If you are using strain relief boots, slide one onto the cable now, narrow end first, before you attach the first connector. The boot cannot fit over a crimped connector, so this step must happen before termination. Push the boot several inches back from the end to keep it out of your way while you work.
Strip the outer jacket (about 1 inch)
Place the cable end into your jacket stripper about 1 to 1.5 inches from the tip. Rotate the stripper once around the cable to score the jacket, then pull the cut section off. You should see four twisted pairs inside, possibly with a spline separator (common in Cat6).
Inspect every wire. If you see any nicked or damaged insulation, cut the cable back and strip again. A nicked wire can cause intermittent shorts that are extremely difficult to diagnose later.
Untwist and straighten the wires
Separate all four twisted pairs and untwist each one. If your cable has an internal spline or cross separator, trim it flush with the jacket.
Straighten each wire by running it between your thumb and forefinger. Stranded cable conductors are more flexible than solid, so they tend to hold curves and kinks more stubbornly. Take the extra time to get each wire as flat and straight as possible. This makes arranging them in the correct order much easier.
Arrange wires in T568B order
Hold all eight wires flat between your thumb and forefinger. Arrange them left to right in T568B order:
A helpful mnemonic: start with the orange pair on the left, then green-white crosses over the blue pair, then the blue pair sits in the middle, then the rest of the green pair, and finally brown on the right.
This is the step where most errors happen. Take your time and double-check before proceeding. The two pairs most commonly swapped are the blue and green pins in the center (pins 3 through 6).
Flatten and trim wires to even length
Squeeze all eight wires flat and parallel between your fingers. Use flush cutters or the cutter on your crimp tool to trim them to an even length. Leave approximately half an inch of exposed wire beyond the jacket.
The cut must be perpendicular to the wires. If one wire is even slightly shorter than the others, it may not reach the contact blade inside the connector, resulting in an open pin that fails the cable test.
Insert wires into the RJ45 connector
Hold the connector with the clip facing down and the gold contact pins facing up. Slide the wires into the back of the connector while maintaining their left-to-right order. Apply firm, even pressure.
With pass-through connectors, push the wires all the way through until they extend out the front of the connector. This is the key advantage: you can now see every wire color at the tip and confirm the order before you commit to the crimp.
Make sure the cable jacket extends far enough into the connector body that the strain relief clamp will grip it during crimping. The jacket, not just bare wires, must be inside the connector.
Verify all 8 wires are visible and in correct order
Before crimping, look at the wire tips extending from the front of the connector. Count all eight wires and confirm T568B order from left to right: orange-white, orange, green-white, blue, blue-white, green, brown-white, brown.
If any wire is out of order or if fewer than eight wires made it through, pull the wires out, rearrange, and reinsert. This is a free correction. After crimping, the only fix is cutting the connector off and starting over with a new one.
Crimp with a ratcheted crimp tool
Seat the loaded connector into the crimp tool die. Push it all the way in until it stops. Squeeze the handles together firmly and steadily until the ratchet mechanism releases on its own.
The crimp cycle does three things at once:
- Drives the contact blades through the wire insulation to make electrical contact with the copper conductors
- Clamps the strain relief onto the cable jacket to prevent pull-outs
- Locks the connector housing so the plug clicks securely into jacks
Trim excess wire from the connector front
If your crimp tool automatically trims during the crimp cycle (the EzEX Crimp Tool does this), you are done with this step. If not, use flush cutters to clip the wire ends flush with the front face of the connector. Do not leave any wire protruding as it can snag or interfere with the jack contact.
Repeat on the other end
Slide a second strain relief boot onto the cable (if using boots), then repeat the entire process on the other end: strip the jacket, untwist and straighten, arrange in T568B order, insert, verify, crimp, and trim.
Use the same T568B standard on both ends. When both ends are wired T568B, you have a straight-through cable, which is the correct type for connecting a computer, IP phone, access point, or any other device to a switch, router, or wall jack.
Test with a cable tester
Plug both ends of the finished cable into a cable tester. Run a wiremap test. The tester checks every pin for:
- Continuity on all 8 conductors (no opens)
- Correct pin-to-pin mapping (no crossed wires)
- No short circuits between conductors
- No split pairs (wires from different pairs swapped)
A passing wiremap means your patch cable is ready for service. If any pin fails, cut the bad connector off, strip fresh cable, and re-terminate. Do not try to re-crimp a failed connector.
For production work, a VDV MapMaster 3.0 provides detailed diagnostics including the specific fault type and location, which makes troubleshooting faster.
Pro Tips for Better Patch Cables
Once you have the basic process down, these techniques reduce rework and produce more professional results.
- Preserve the twist. Keep the wire pairs twisted as close to the connector as physically possible. The twist is the primary mechanism that cancels crosstalk between pairs. Untwisting more than half an inch beyond the jacket degrades signal quality, and excessive untwisting can cause Cat6 cables to fail certification.
- Use strain relief boots on every cable. Boots are inexpensive and they dramatically extend the life of a patch cable. Without a boot, the cable jacket at the connector base takes all the bending stress, and eventually the connection fails. Read our strain relief guide for more on why this matters.
- Label both ends. Before you snap the boot on, wrap a small label around the cable or use a cable marker to identify it. Labels save hours of tracing when you need to move or troubleshoot cables in a dense patch panel.
- Pre-cut a wire length template. If you are making many cables of the same length, cut one piece of cable to the desired length and use it as a template for cutting the rest. This is faster and more consistent than measuring every cable individually.
- Work at a table. Your accuracy improves dramatically when you crimp on a flat, stable surface with good lighting. Making cables in your lap or on a ladder leads to more mistakes and more wasted connectors.
- Keep spare connectors on hand. Even experienced installers fail a termination occasionally. Having extra connectors means you can immediately re-do a bad crimp without stopping work. Budget 2 to 3 extra connectors per 10 cables.
- Develop a consistent sorting technique. Rather than arranging all 8 wires at once, start by separating orange and brown to the outside edges, then slot the green-white and blue pairs into the middle. With practice, this becomes a 5-second process.
Common Mistakes to Avoid
These are the errors that cause the most failed cables. If your patch cables are not passing the tester, check for these problems first.
Using solid cable instead of stranded
Solid cable works fine initially, but the single-strand conductors fatigue and break with repeated flexing. A patch cable made from solid cable may work for weeks or months before developing intermittent failures. Always use stranded cable for any cable that will be moved, bent, or plugged and unplugged.
Untwisting too much wire
Every millimeter of untwisted wire increases crosstalk between pairs. Keep the untwisted portion to the absolute minimum needed to arrange and insert into the connector. This is especially critical for Cat6 and Cat6A cables, which have tighter performance margins.
Uneven wire lengths before insertion
If one wire is shorter than the others, it will not reach the contact blade inside the connector. The result is an open pin on your cable test. Always trim all eight wires to exactly the same length with a clean, perpendicular cut.
Wrong wire color order
Swapping even one wire creates a miswire that will fail the cable test and potentially cause network problems. The most common mistakes are swapping green-white and blue (pins 3 and 4) or reversing a pair. Double-check the order visually before every crimp.
Mismatched connectors and cable
Using a Cat5e connector on Cat6 cable (or vice versa) causes either too-tight insertion that damages wires or too-loose contacts that create intermittent connections. Always match connector category to cable category.
Skipping the cable test
Even a cable that looks perfect can have a fault invisible to the eye. A split pair, for example, passes a visual inspection but fails under load. Test every single cable. No exceptions.
Patch Cable vs Permanent Cable Run
Patch cables and permanent cable runs serve different purposes and use different materials. Understanding the difference prevents you from using the wrong cable or connector type for the job.
| Patch Cable | Permanent Run | |
|---|---|---|
| Cable type | Stranded conductor | Solid conductor |
| Flexibility | Highly flexible, bends easily | Stiff, holds shape |
| Termination | RJ45 plug connectors on both ends | Keystone jacks or patch panels (punch-down) |
| Typical length | 1 to 25 feet | 25 to 295 feet |
| Environment | Between device and wall jack, or in patch panels | Inside walls, ceilings, conduit |
| Movement | Plugged/unplugged frequently | Installed once, never moved |
| Connector match | Stranded-rated RJ45 plugs | Solid-rated keystone jacks or plugs |
The ideal network setup uses solid cable for the permanent run from the patch panel to the wall jack, and stranded patch cables at both ends (patch panel to switch, and wall jack to device). This gives you the best performance on the fixed portion and the best durability on the portions that get handled.
For more on choosing between cable types, see our guides on Cat5e vs Cat6 vs Cat6A and solid vs stranded cable connectors.
Buy vs Make: Cost Breakdown
Should you make your own patch cables or buy them pre-made? The answer depends on how many you need.
| Item | Cost | Notes |
|---|---|---|
| One-Time Tool Investment | ||
| Crimp tool | $40 - $80 | Clamshell for budget, EzEX for production work |
| Cable stripper | $15 - $25 | Essential for clean, safe jacket removal |
| Cable tester | $50 - $150 | LanSeeker for basic, MapMaster for advanced diagnostics |
| Per-Cable Materials | ||
| Bulk stranded cable (per foot) | $0.10 - $0.20 | Based on 1,000 ft box pricing |
| 2x RJ45 connectors | $0.50 - $0.70 | Based on 50-100 pack pricing |
| 2x Strain relief boots | $0.10 - $0.20 | Optional but recommended |
| Cost per 6-foot patch cable | $1.20 - $2.30 | Materials only (after tool investment) |
A comparable pre-made Cat6 patch cable retails for $5 to $12 depending on length and brand. The break-even point is roughly 10 to 15 cables, after which every additional cable you make saves you $3 to $10 in materials alone.
But the real value is not just cost. It is the ability to make any length you need, in any color, at any time. No waiting for delivery, no paying for shipping, and no settling for the closest available length.
Frequently Asked Questions
Should I use solid or stranded cable for patch cables?
Use stranded cable for patch cables. Stranded conductors are made of multiple thin copper wires twisted together, which makes the cable flexible and resistant to the repeated bending and plugging that patch cables endure daily. Solid cable is stiffer and designed for permanent in-wall or in-ceiling runs where it will not be moved after installation. Using solid cable for a patch cable will lead to conductor fatigue and intermittent failures over time. See our solid vs stranded connector guide for more detail.
Is it cheaper to make your own Ethernet cables?
For a single cable, buying pre-made is usually cheaper because you need to invest in a crimp tool ($40-$80), cable stripper ($15-$25), and cable tester ($50-$150). However, once you own the tools, each additional cable costs about $1 to $2 in materials. If you make 10 or more cables, the per-cable cost drops well below retail, and you gain the ability to make exact custom lengths in any color at any time.
What is the T568B wiring order for Ethernet?
The T568B wiring order from pin 1 to pin 8 is: orange-white, orange, green-white, blue, blue-white, green, brown-white, brown. T568B is the most widely used standard in the United States for both commercial and residential installations. For a straight-through patch cable, wire both ends in T568B. For the complete reference including T568A, see our RJ45 pinout guide.
What is a pass-through RJ45 connector and why should I use one?
A pass-through RJ45 connector (like the EZ-RJ45) has an open front that lets the wires extend all the way through the connector body during insertion. This lets you see the color order of every wire at the tip before you crimp, dramatically reducing wiring errors. The excess wire is trimmed off during or after crimping. Pass-through connectors are recommended for both beginners and professionals. Read our pass-through vs standard connector guide for a full comparison.
How long can an Ethernet patch cable be?
The maximum total length for an Ethernet channel is 100 meters (328 feet) per TIA/EIA standards. This includes the permanent link plus all patch cables on both ends. In practice, individual patch cables are typically 1 to 15 feet in a rack or office and up to 25 feet for connecting a device to a wall jack. For longer distances, run permanent solid cable with keystone jacks and use shorter patch cables at each end.
Recommended Gear for Making Patch Cables
Here is what we recommend for a complete patch cable making setup, from budget-friendly starter kits to professional production tools.
Starter Setup
Everything a beginner needs for Cat5e and Cat6 patch cables
Affordable entry point with pass-through convenience. Great for home networks and small office projects.
Professional Setup
For installers making Cat5e through Cat6A patch cables on commercial jobs
The EzEX handles the full EZ-RJ45 and ezEX connector family with auto-trim. The MapMaster identifies every fault type including split pairs.
All-in-One Kit
Crimp tool plus connectors in a single package
Includes the EzEX Crimp Tool, a selection of EZ-RJ45 and ezEX connectors for both data and voice, and a carrying case. Everything in one box.
Related Guides
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