Daktronics G-1000-34-R - Manual (Page 17)

Electrical
Installation
3-1
Section 3: Electrical Installation
3.1 Conduit
Reference Drawings: System Riser Diagram (422) . . . . . . . . . . . . . . . Drawing A-88425
System Riser Diagram (Modem) . . . . . . . . . . . . . Drawing A-88426
Power/Signal Termination Panel . . . . . . . . . . . . . Drawing A-88427
Overall Dimensions; G-1000 . . . . . . . . . . . . . . . . Drawing A-88154
Daktronics does not include the conduit. Knockouts will be provided. Separate conduit must
be used to route:
C
power
C
signal IN wires
C
signal OUT wires (if signal is required for another display).
The conduit holes are located at the bottom right (rear view) of the back of the display.
To access the knockouts, remove the right end cap (front view) on the bottom line and slide the
face panel out until the left module is cleared. Refer to Drawing A-88154 (Section 1) and Section
4.3 to remove the module.
Punch or drill out the desired knockouts. Note: Be careful that none of the components are damaged.
Attach the conduit and route the power and signal cables. Refer to Drawing A-88427 for the signal
and power termination panel.
For displays with more than one face, signal and temperature sensor wiring between the displays can
be routed through the same conduit.
3.2 Grounding
The display must be connected to earth-ground. Proper grounding is necessary for reliable
equipment operation. It also serves to provide protection to the equipment against damaging
electrical disturbances and lightning. If the following grounding methods are not adhered to,
the warranty will be void.
˜
Displays MUST be grounded according to the provisions outlined in Article 250 of the
National Electrical Code.
˜
The support structure for the display cannot be used as grounding. The support is generally
embedded in concrete, and if in earth, the support is either primed or it corrodes, making it a poor
ground. Use one ground rod at each support column.
The National Electrical Code requires the use of a lockable power disconnect near the display.
Provide a lockable disconnect switch (knife switch) at the display location so that all power lines
can be completely disconnected. Use a multi-conductor disconnect so that all the hot and the
neutral lines can be disconnected. This is important in protecting the display against lightning.
There are two considerations for power installation, New Power and Existing Power Installation.
These two power installations differ slightly, as described in the following paragraphs.