Components, Electronics & Scientific Guide, How To

How to Make Ethernet Cable

Usually, you buy network cables ready made. A self-production can be very useful in some situations, e.g.

  • If the cable channel is already so full that no cable plug fits through more.
  • When the cable has to be routed through a tight hole in a wall.
  • When the cable lengths are to be adjusted precisely.

The production is not as complicated and costly as it is often claimed. Here is a step-by-step guide on how to reliably and inexpensively assemble your cables. Our experiments have shown that a crimping tool in a simple design is sufficient.


  • Network cable FTP (Foiled Twisted Pair) cat.5, price from approx. EUR 0.50 per meter
  • RJ45 plug, shielded (with guide aid and anti-kink protection), as in the first picture, price from approx. EUR 1.20 per piece
  • Crimping tool RJ45 (single version), price from approx. EUR 15,00
  • Stripping knife, tweezers, needle nose pliers, small screwdriver

Steps to make an ethernet cable

  1. Push the protective and the sheath on the cable (forget it easy !!!).  Then remove the outer cover of the cable to about 2 cm, bend wire (if available) to the rear.
  2. Unwrap and arrange veins: white / orange – orange – white / green – blue – white / blue – green – white / brown – brown.
    There is also another color variant; It is only important that both cable plugs are assigned the same.
    Push the leads into the introducer (possibly with tweezers) and cut straight.
  3. Hold the plug with the viewing window upwards and insert the wires together with the guiding aid all the way under the contacts (white/orange is on the left, brown on the right).
  4. Insert the plug into the crimping tool so that the gold contacts lie precisely under the crest of the pliers. Then press the pliers as far as they will go.
  5. The contacts are now pushed in and connected to the wires.
  6. Wire the cable to the connector shield.
  7. Use pointed pliers to bend the cable pull fuse.
  8. Using a screwdriver, bend the two inner side tabs inwards.
  9. Only the outer flags remain as a guide for the buckling protection.
  10. Slide on the cover. Finished.


The instructions apply in the details, of course, only for the plug type shown. The cable shown is a “patch cable.” All wires are looped 1: 1. It is used, for example, to connect a PC to a network socket or a hub. To connect two PCs, a “crossover cable” is needed in which individual lines are reversed.

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