Daktronics FB-2500 Modular LED Football Scoreboard - Manual (Page 18)

12 Electrical Installation
Installation with Ground and Neutral Conductors Provided
For this type of installation, the power circuit must contain an isolated earth-ground
conductor. In this circumstance, do not connect neutral to ground at the disconnect or at the
display as this would violate electrical codes and void the warranty.
Use a disconnect so that all ungrounded lines can be disconnected. The National Electrical
Code requires the use of a lockable power disconnect within sight of or at the display.
Installation with Only a Neutral Conductor Provided
Installations where no grounding conductor is provided must comply with Article 250-32 of
the National Electrical Code. If the installation in question meets all of the requirements of
Article 250-32, the following guidelines must be observed:
 Connect the grounding electrode cable at the local disconnect, never at the display
driver/power enclosure.
 Use a disconnect that opens all of the ungrounded phase conductors.
Connection
Both power and signal cables are routed into the scoreboard from the rear via conduit.
All power and signal wiring terminates at the master driver enclosure.
Look for a warning label similar to Figure 12 to locate
the access panel to the driver enclosure. Remove the
screws or loosen the latches to open the access door
panel. Remove the metal cover of the driver enclosure to
expose the driver components (Figure 13).
Connect the appropriate wires coming through the rear of the scoreboard to the main
terminal block, as shown in Figure 13. Note that SIGNAL OUT connects here as well.
Figure 12: Power Warning Label
Figure 13: Driver Enclosure & Main Terminal Block