How to Splice a Cat5 Cable

Techwalla may earn compensation through affiliate links in this story. Learn more about our affiliate and product review process here.
Image Credit: Hemera Technologies/PhotoObjects.net/Getty Images

A Category 5, or Cat5, cable is composed of a set of four twisted pairs of smaller cables that transmit and receive signals encased in a flexible plastic jacket. Cat5 cables provide Ethernet connections among computers, network routers and hubs at speeds up to 100 megabits per second and to distances of up to 100 meters. Commercial vendors sell Cat5 cables in reels so the cable can be cut to size as well as in pre-cut lengths that work for most computer networking needs. The twisted pair wires are color-coded so they can be properly terminated in RJ-45 terminals. If an existing Cat5 cable needs to be lengthened, it can be spliced with an additional length of cable.

Advertisement

Step 1

Measure the existing cable length and subtract it from the connection distance to determine how much much splice cable to cut.

Video of the Day

Step 2

Measure and cut a length of Cat5 cable to a length slightly greater than your splicing measurement and then remove about a half-inch of the cable jacket on either end.

Advertisement

Step 3

Cut the terminated cable (RJ45 jacks on either end) in half and remove about a half-inch of the cable jacket on either side of the cut.

Step 4

Separate the four twisted pairs (eight wires, four pairs in white/green, white/orange, white/blue, white/brown) at the cut ends of each cable.

Advertisement

Step 5

Use the wire stripper or a razor utility knife to remove a quarter-inch of the wire shielding for all of the cables. Take care to keep the wire pairings intact.

Advertisement

Step 6

Twist each wire at both ends of the splice cable to the corresponding wire in the two cut cables (blue to blue, green to green and so on) and wrap each exposed wire connection with a piece of electrical tape.

Step 7

Wrap electrical tape around the Cat5 cable at the splice points to finish the splice.

Video of the Day

Advertisement

Advertisement

references & resources

Report an Issue

screenshot of the current page

Screenshot loading...