Chapter 4: Preparing for installation
Testing system components
Page
4-10
Best Practices for Cabling
The following practices are essential to the reliability and longevity of cabled connections:
•
Use only shielded cables to resist interference.
•
For vertical runs, provide cable support and strain relief.
•
Include a 2-ft (0.6-m) service loop on each end of the cable to allow for thermal expansion and
contraction and to facilitate terminating the cable again when needed.
•
Include a drip loop to shed water so that most of the water does not reach the connector at the
device.
•
Properly crimp all connectors.
•
Use dielectric grease on all connectors to resist corrosion.
•
Use only shielded connectors to resist interference and corrosion.
Wiring Connectors
The following diagrams correlate pins to wire colors and illustrate crossovers where applicable.
Pin 1, relative to the lock tab on the connector of a straight-through cable is located as shown below.
Figure 70 Pin 1 location
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