Making Ethernet Cables – Simple and Easy

Ethernet Cable Ethernet cables can be quite expensive and pre-made lengths are not always the length you need. Making Ethernet cables is easy with a box of bulk Category 5e Ethernet cables and RJ-45 connectors that are attached to the cut ends of your preferred cable length.

How to Make an Ethernet Cable – What You’ll Need

Bulk Ethernet Cable - Category 5e or CAT5e

Bulk Ethernet Cable – Category 5e or CAT5e(You may also use Category 6 or CAT6 cabling, which has higher performance specifications and is about 20% more expensive than CAT5e.)
Bulk RJ45 Crimpable Connectors

Bulk RJ45 Crimpable Connectors for CAT-5e or Bulk RJ45 Crimpable Connectors for CAT-6
RJ-45 Crimping tool

RJ-45 Crimping tool

The two kinds of Ethernet cables you can make

There are two kinds of Ethernet cables you can make: straight through and crossover.

Straight through Ethernet cables

Straight through Ethernet cables are the standard cable used for almost all purposes, and are often called ‘patch cables’. It’s highly recommended you duplicate the colour order as shown on the left. Note how the green pair is not side-by-side, like the other pairs. This configuration allows for longer wire runs.
Crossover Ethernet cables

Crossover Ethernet cables directly connect one computer or device to another without going through a router, switch, or hub.

How to make a standard cable

Cut one inch into the plastic sheath illustrated Cut into the plastic sheath about

one inch (2.5 cm) from the end of the cut cable. The crimping tool has a razor blade that will do the trick with practice.
Unwinding and pairing illustrated Unwind and pair the similar colors.
Pinching wires illustrated Pinch the wires between your fingers and straighten them out as shown. The colour order is important to get correct.
Scissors illustrated Use scissors to make a straight cut across the eight wires to shorten them to

half an inch (1.3 cm) from the cut sleeve to the end of the wires.
Wires into the connector illustrated Carefully push all eight unstripped coloured wires into the connector. Note the position of the blue plastic sleeve. Also note how the wires go all the way to the end.
How the wires should look illustrated A view from the top. All the wires are all the way in. There are no short wires.
Incorrect wire positioning v1 illustrated

This is the wrong way. Note how the blue plastic sleeve is not inside the connector where it can be locked into place. The wires are too long. The wires should extend only half an inch from the blue cut sleeve.
Incorrect wire positioning v2 illustrated

This is the wrong way. Note how the wires do not go all the way to the end of the connector.
Crimping ethernet cable illustrated

Crimping the cable. Carefully place the connector into the Ethernet crimper and cinch down on the handles tightly. The copper splicing tabs on the connector will pierce into each of the eight wires. There’s also a locking tab that holds the blue plastic sleeve in place for a tight compression fit. When you remove the cable from the crimper, that end is ready to use.
Ethernet Repeat Steps illustrated For a standard ‘straight through’ cable, repeat all steps and wire colour order on the other end of the cable. For a crossover cable, the other end will have a different colour order as shown by the crossover picture above.
Ethernet Cable Tester Make sure to test the cables before installing them. An inexpensive Ethernet cable tester does this quite well.

NOTE – The maximum cable length of CAT-5, CAT-5e or CAT-6 Ethernet cable is 328 feet or 100 metres.

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