2
HDBT - General Guidelines and Recommendations
2
General Guidelines and Recommendations
It is essential that you keep away as far as possible from EMI (Electro-Magnetic Interference) environments,
and in particular
:
EMI sources:
Keep the cable away from electromagnetic interference environments such as high-voltage
electrical cables, electric motors (such as elevators or refrigerators), fluorescent, light-fixtures and so on
AC power cables:
Keep the cable at a distance of at leas
t 12” from AC power cables
AC power canals:
Do not use electrical conduits to deploy the cable
Patch cords:
For better results do not use patch cords
Proper cable termination is crucial; otherwise installation failure may occur
(see
Section
3
):
Make sure that the drain wire is well soldered to the metal casing of the RJ-45 connectors on both cable ends
Always use the recommended Kramer RJ-45 connector (CCR-RJ45-TP6)
Keep the pairs twisted as close to the termination point as possible and make sure that the strain relief is pulled
over the purple jacket of the cable
2.1
General Rules
The following are general rules to follow during the installation.
We recommend that you:
Make only gradual bends in the cable when necessary to maintain the minimum bend radius of 4 times the cable
diameter or approximately 3cm radius
Use low-to-moderate force when pulling cable. The standard calls for a maximum of 25 lbf (pounds of force)
Never
:
Bend, twist, or kink the cable at any time. Doing so may result in permanent damage to the geometry of the cable
and cause transmission failures
Over-tighten cable ties or use plastic ties
Splice or bridge Category cable at any point
Use excessive force when pulling the cable
Tie cables to electrical conduits, or lay cables on electrical fixtures
Install taut cables (cables should be loose, but not sagging)
Use staples on CAT cable that crimp the cable tightly
2.2
Patch Cables and Connectors
Ideally, the signal from the transmitter to the receiver should be transmitted using a single cable; however, often patch
cables are used to connect the device to the deployed cable. Considering that patch cables tend to be the weakest link
in the installation, they should only be used if absolutely necessary (at the transmitter or receiver), and these cables
should be kept as short as possible.
Be sure to verify that the patch cord connector is terminated using the same wiring scheme as the category cable.
