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(2) Coaxial cable
Coaxial cable consists of a center conductor and an external conductive layer that functions as a
shield. Coaxial cables used for Ethernet connections must have 50 ohms of impedance. An RG58A/
U cable can be used with 10BASE2 and a yellow cable can be used with 10BASE5.
The maximum length of a single 10BASE2 cable is 185 m and the maximum length of a 10BASE5
cable is 500 m.
Make sure to connect the shield (external conductive) to the ground to prevent problems from noise
(class D single point ground).
Center conductor
(tin plated mild copper wire)
Insulation
material
(3) Coaxial connectors
A coaxial connector is usually an "N" type connector. It is used to connect the coaxial cable to a
termination device, another coaxial cable or to a connector type transceiver.
Aluminum/polyester
tape
Four layer construction
Jacket
of the outer conductor
(PVC)
Coaxial cable for Ethernet networks
Coaxial connector for Ethernet use
15-35
Chapter 15: Appendix
Braid shield
(tin plated mild copper wire)
Jacket ring mark
(every 2.5 m)
15
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