Chapter 3 Installing the TimeSource 3100
Installing the Antenna
50 TimeSource 3100 User’s Guide 097-72020-01 Revision K – December 2005
8. Bolt the lightning suppressor mounting plate to a flange that is attached to a valid
earth ground. The roof ring ground system, a Central Office grounding plate, and
building structural steel are examples of valid earth ground points. If the
mounting plate cannot be bolted to a valid earth ground, bolt the mounting plate
to a point within 15 feet (4.6 m) of the chosen valid earth ground. If the mounting
plate is to be installed in a nonmetallic junction box, perform the installation and
bolt the assembly near the chosen valid earth ground.
9. Assemble the lightning suppressor as shown in Figure 3-5.
Figure 3-5. Assembling the Lightning Suppressor
10.Install 1.5-inch (3.8 cm) nonmetallic conduit from the antenna to the lightning
suppressor, and from the lightning suppressor to the cable entrance into the
building.
11.Install a user-supplied bracket, preferably non-metallic, to support the vertical
section of conduit to the antenna.
Note: A junction box must have inside dimensions of 7 cm by
7 cm by 4 cm to hold the mounting plate and attached
components.
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