Hughes Network Systems 24SX-001 Benutzerhandbuch
1027144– 0001 Revision D
Installing ODUs 6–23
RT installation
Grounding the ODU requires several connections, as shown in
figure 6-23. In making the ground connections, follow these
practices:
figure 6-23. In making the ground connections, follow these
practices:
•
For all ODU ground connections, use compression
connectors (such as compression lugs or compression
clamps).
connectors (such as compression lugs or compression
clamps).
•
For all threaded ground connections, use a flat washer and
lock washer (with the lock washer next to the nut).
lock washer (with the lock washer next to the nut).
Ground the ODU as follows:
1.
Connect one end of the ground cable (No. 6 AWG or
greater, green) to the ODU ground connector, which is
shown in figure 6-23.
greater, green) to the ODU ground connector, which is
shown in figure 6-23.
2.
Connect the ground cable to a bolted joint on the mast
mount.
mount.
Important:
For this connection, strip the cable but do not
cut it. See figure 6-23. The cable continues from the bolted
joint to the ground point.
joint to the ground point.
3.
Connect the ground cable to a suitable ground point on the
rooftop.
rooftop.
The best ground point for the ODU is an earth–referenced
roof ring conductor that follows the perimeter of the
building, constructed according to the requirements of
NFPA 780 or a similar regulatory code. However, such a
conductor is not always present. Other alternatives are
acceptable, as long as they comply with the grounding
requirements detailed in the Hub and Remote Terminal Site
Preparation Guide.
roof ring conductor that follows the perimeter of the
building, constructed according to the requirements of
NFPA 780 or a similar regulatory code. However, such a
conductor is not always present. Other alternatives are
acceptable, as long as they comply with the grounding
requirements detailed in the Hub and Remote Terminal Site
Preparation Guide.
Building steel can also be used as a ground point. However,
before using building steel, verify that the steel structure
is electrically continuous throughout the entire building
and that it is properly connected to earth ground. For
detailed grounding requirements, see the Hub and Remote
Terminal Site Preparation Guide.
before using building steel, verify that the steel structure
is electrically continuous throughout the entire building
and that it is properly connected to earth ground. For
detailed grounding requirements, see the Hub and Remote
Terminal Site Preparation Guide.
4.
Apply anti–oxidant (HNS 9008224–0002) to each ground
lug (points 1, 2, and 3 in figure 6-23).
lug (points 1, 2, and 3 in figure 6-23).
5.
Apply 1/2–inch (13–millimeter) heat shrink tubing (HNS
9007488–0005) to each ground lug after the connection is
complete.
9007488–0005) to each ground lug after the connection is
complete.
Important:
You must slip the heat shrink onto the cable
before you make the connections.
Note:
A resistance of less than 5 ohms is desirable from the
ODU to earth, including the earth field.
6.10
Grounding the ODU