Daktronics BA-1018, Display Manual

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7-2 Electrical Installation
WARNING: It is critical that the scoreboard circuit be fused at 15 A and that all
conductors used must be designed to pass a 15 A current in normal operation.
Failure to meet wiring and overcurrent protection device requirements is a violation
of the National Electrical Code
®
and will void the scoreboard warranty .
All power conductors are 14 AWG, except where 18 AWG wiring is called out on
the schematic. All signal conductors are 22 AWG.
Refer to the outdoor scoreboard schematics listed at the beginning of this section and
to the tables in
Section 3 to determine circuit specifications and maximum power
requirements for the models described in this manual.
Grounding
Reference Drawings:
Schematic; Gen III Outdoor LED,
16 Column Drvr .............................................. Drawing A-177931
Schematic, Gen III Outdoor Driver,
8 Column Driver.............................................. Drawing A-177935
Schematic; Gen III OD LED,
3 Drvr Display ................................................. Drawing A-179541
Schematic; Gen III, OD LED,
1 Drv w/TNMC ................................................ Drawing A-179790
Schematic; Gen III, OD LED,
3 Drv w/TNMC ................................................ Drawing A-180081
Schematic; Gen III, O.D. LED,
2 Drvr Display ................................................. Drawing A-180637
Schematic; BA-2011/2007 Gen III ........................ Drawing B-181354
Schematic; Gen III, OD LED,
1 Drvr w/ S.O.P............................................... Drawing B-210454
Note: Displays MUST be grounded according to the provisions outlined in Article
250 of the National Electrical Code and according to the specifications in this
manual. Daktronics recommends a resistance-to-ground of 10 ohms or less.
The electrical contractor performing the electrical installation can verify ground
resistance. Daktronics Sales and Service personnel can also provide this service.
The display system must be connected to an earth electrode installed at the display.
Proper grounding is necessary for reliable equipment operation. It also protects the
equipment from damaging electrical disturbances and lightning.
Note: The display must be properly grounded, or the warranty will be void.
Refer to the schematics listed at the beginning of this section for information about
ground wire connection. The connection is illustrated in the “Pwr In” detail on each
of the schematics.
The material for an earth-ground electrode differs from region to region and may
vary according to conditions present at the site. Consult the National Electrical Code
and any local electrical codes that may apply.