What you need to know about the color codes of UTP cables

When connecting network cables, the correct color sequence of the wires is crucial. If the colors aren't followed correctly, the connection will be erratic or non-existent. This explanation explains the color codes for UTP cables, the differences between the two standards, and how to build your own cable that works immediately.

What do you use UTP cables for at home and at work?

UTP cables are used to connect devices to a network, such as computers, modems, switches, or printers. They are suitable for both home use and larger business networks. Because they are shielded against interference, they are reliable for stable internet connections.

What is the difference between 568A and 568B

There are two standards that determine the color sequence of the wires in a UTP cable. These are 568A and 568B. Both methods are technically equivalent, but they use a different color sequence. In the Netherlands, we use the 568B scheme.

Color sequence at 568A:

1. white/green
   

2. green
   

3. white/orange
   

4. blue
   

5. white/blue
   

6. orange
   

7. white/brown
   

8. brown
   
   

Color sequence at 568B:

1. white/orange
   

2. orange
   

3. white/green
   

4. blue
   

5. white/blue
   

6. green
   

7. white/brown
   

8. brown
   
   

In the Netherlands, 568B is primarily used. This is because this standard better suits most existing network installations in homes and offices.

What can go wrong with an incorrect color sequence

If the colors on one end of the cable don't match the other, a fault occurs. In many cases, the network won't work at all, or the connection will constantly drop. This can also happen if the wires aren't properly inserted into the connector or aren't fully crimped. Therefore, always check that both ends are in the same order and that the colors are clearly visible in the connector.

Make your own UTP cable in a few steps

With a little skill, you can easily make your own network cable. You'll need a piece of UTP cable, crimping tools, RJ45 connectors, and a cable stripper. Follow these steps:

1. Strip the outer sheathing of the cable about three centimeters.
   

2. Unfold and straighten the pairs of veins.
   

3. Choose a standard, for example 568B, and lay the wires in that order.
   

4. Cut the ends straight so that they are all the same length.
   

5. Gently push the wires into the RJ45 connector until they are all the way at the front.
   

6. Crimp the plug with the pliers.
   

7. Test the cable with a cable tester to make sure everything is working.
   
   

Useful tools for making your own network cable

To ensure a good connection, use a few handy tools:

• Crimping pliers for securely fastening the RJ45 connector
  

• Cable tester to immediately check whether the cable is properly connected
  

• Cable stripper for quickly removing the outer sheath
  

• Connectors that match the type of cable you use
  
  

These tools will help you work faster and reduce the chance of errors.

Choose the right cable for your situation

There are two types of UTP cables: solid core and flexible core. Solid core is intended for permanent installations, such as through walls or cable ducts. Flexible core is used for patch cables that are frequently moved. The difference lies in the strength of the conductor and determines which connector you need. Pay close attention to this when ordering cables or connectors.

Color coding chart to print

To simplify wiring, you can print out a diagram showing the color sequence of 568A and 568B. This helps when laying and checking multiple cables simultaneously. This is especially useful when working on-site or making multiple connection points simultaneously.