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How to Crimp an Ethernet Cable (RJ45)

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  1. How to Crimp an Ethernet Cable (RJ45), Prepare the Cable: passo 1, immagine 1 di 2 How to Crimp an Ethernet Cable (RJ45), Prepare the Cable: passo 1, immagine 2 di 2
    • Caution: If you are using strain relief boots, slide one onto the cable before you start stripping. You cannot add it later!

    • Insert the cable into the stripper's designated slot.

    • Rotate the tool 360 degrees around the cable to score the outer jacket.

    • Tip: Be gentle. You only want to cut the outer plastic jacket, not the delicate copper wires inside.

    • Pull the outer jacket off to reveal the internal wires. You should expose about 1.5 to 2 inches (4-5 cm) of wire

  2. How to Crimp an Ethernet Cable (RJ45), Untwist and Organize: passo 2, immagine 1 di 3 How to Crimp an Ethernet Cable (RJ45), Untwist and Organize: passo 2, immagine 2 di 3 How to Crimp an Ethernet Cable (RJ45), Untwist and Organize: passo 2, immagine 3 di 3
    • You will see four twisted pairs of wires. Untwist them completely so you have 8 separate wires.mpetenza.

    • Straighten the wires as much as possible using your fingers or the shaft of a screwdriver.

    • Cut off the "rip cord" (the thin thread inside the cable) if present, so it doesn't get in the way.

  3. How to Crimp an Ethernet Cable (RJ45), Arrange the Color Code (T568B): passo 3, immagine 1 di 1
    • Arrange the wires flat, side-by-side, from left to right according to the T568B standard: White/Orange - Orange - White/Green - Blue - White/Blue - Green - White/Brown - Brown

    • Tip: A common mnemonic is to remember that the solid colors alternate, except for the blue pair which is reversed (Blue is sandwiched between the Green pair).

  4. How to Crimp an Ethernet Cable (RJ45), Trim the Wires: passo 4, immagine 1 di 2 How to Crimp an Ethernet Cable (RJ45), Trim the Wires: passo 4, immagine 2 di 2
    • Hold the wires tightly between your thumb and forefinger to keep them flat and in order.

    • Use your wire cutters (or the cutting blade on your crimper) to trim the wires in a perfectly straight line.

    • You should leave about 0.5 inches (1.3 cm) of exposed wire.

    • Critical: If the wires are too long, the connector won't clamp onto the cable jacket, leaving a weak connection. If they are too short, they won't reach the gold contacts.

  5. How to Crimp an Ethernet Cable (RJ45), Insert Wires into the Connector: passo 5, immagine 1 di 2 How to Crimp an Ethernet Cable (RJ45), Insert Wires into the Connector: passo 5, immagine 2 di 2
    • Hold the RJ45 connector with the clip facing away from you (gold pins facing up).

    • Carefully push the wires into the connector. Ensure they stay in the correct order (White/Orange on the left).

    • Push until you see the copper ends of the wires touching the very front of the plastic plug.

    • Look at the side of the connector: The cable's outer jacket should be inserted past the indentation near the rear of the plug. This ensures the crimp secures the jacket, not just the wires.

  6. How to Crimp an Ethernet Cable (RJ45), Crimp the Connector: passo 6, immagine 1 di 3 How to Crimp an Ethernet Cable (RJ45), Crimp the Connector: passo 6, immagine 2 di 3 How to Crimp an Ethernet Cable (RJ45), Crimp the Connector: passo 6, immagine 3 di 3
    • Insert the connector fully into the "8P" slot of your crimping tool.

    • Squeeze the handles firmly until the tool releases (if ratcheted) or until you can't squeeze any further.

    • The tool pushes the gold contacts down into the wires and crushes the plastic tab onto the cable jacket for strain relief.

  7. How to Crimp an Ethernet Cable (RJ45), Inspect and Test: passo 7, immagine 1 di 3 How to Crimp an Ethernet Cable (RJ45), Inspect and Test: passo 7, immagine 2 di 3 How to Crimp an Ethernet Cable (RJ45), Inspect and Test: passo 7, immagine 3 di 3
    • Remove the connector from the tool. Check the pins: they should all be pushed down evenly.

    • Repeat the entire process for the other end of the cable.

    • Optional: Use a cable tester to verify continuity. Connect both ends to the tester; lights 1 through 8 should light up in sequence on both sides.

Conclusione

Per rimontare il dispositivo, segui queste istruzioni in ordine inverso.

Piero Sabino

Membro da: 09/15/15

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