Specifications

Technology Upgrade Communications Grounding 28 1150-2
1224_01
D. Connect the cable ladder to the ground bar in each communications room. Connect with a #6
AWG ground cable.
3.02 PREPARATION
A. Plan routes of all ground cables.
B. For components that are to be connected to the ground system, remove paint from the
connecting point and attach to the ground cable with a star washer.
C. Ground cables shall be connected from the ground bar in each communications room with a
No. 6 AWG ground cable. Items to be connected by the Communications contractor include,
but are not limited to:
1. Racks and cable ladder.
2. Cable tray.
3. Audio Video Systems
4. Protected entrance terminals (PET).
5. Splice cases.
6. Video and audio systems.
7. Data networking equipment.
8. Cabinets.
3.03 INSTALLATION
A. Install the ground bar to the wallfield.
1. Coordinate location with other systems.
2. Work with Electrical contractor to have them connect the ground bar to the electrical
service panel and building steel.
B. Ground connections shall meet all applicable codes, and shall be located such that they are
accessible for maintenance.
1. All grounding conductors shall be continuous without splice.
2. All grounding electrodes and all metallic piping systems shall be bonded together. In
no instance should local metallic piping systems be depended upon as the sole
means of grounding the communications system.
3. Metal boxes, cabinets and fittings, or noncurrent carrying metal parts of other fixed
equipment, if metallically connected to grounded cable armor or metal raceway, are
considered to be grounded by such connection. If not connected, they shall be
grounded in 1 of the following ways:
a. By a grounding conductor run with circuit conductors, this conductor may be
uninsulated. But if it is provided with an individual covering, the covering
should be finished to show a green color.
b. By a separate grounding conductor installed the same as grounding conductor
for conduit and the like.
4. Metal raceways, cable armor, cable sheath, enclosures, frames, fittings, and other
metal noncurrent carrying parts that are to serve as grounding conductors shall be
effectively bonded where necessary to assure electrical continuity and the capacity to
conduct safely any fault current likely to be imposed on them. Any nonconductive
paint, enamel, or similar coating shall be removed at threads, contact points, and
contact surfaces or be connected by means of fittings so designed as to make such
removal unnecessary.
5. Continuity of metal raceway or metallic sheathed cable shall be assured throughout
the system.
6. National electrical code shall be used as guide for grounding in hazardous areas.
C. Ground cables shall be installed in a neat and workmanlike manner.
1. All cables shall be supported or routed against a wall and attached to the wall. No
free floating cables between components will be allowed.
2. Fully support ground cable so that it does not sag between connections.
3. There shall be no sharp bends in the ground cables.