Daktronics SW-2101 Aquatics/Track LED Scoreboard - Manual (Page 15)

Electrical Installation 9
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.
Lightning Protection
The use of a disconnect near the scoreboard to completely cut all current-carrying lines
significantly protects the circuits against lightning damage. In order for this system to
provide protection, the power must be disconnected when the scoreboard is not in use.
The control console should also be disconnected from power and from the signal junction box
when the system is not in use. The same surges that may damage the scoreboard’s driver can
also damage the console’s circuitry.
Installing Load Centers
Reference Drawing:
Electrical Hookup, Outdoor Display........................................................ Drawing A-129998
Outdoor displays have a fully-enclosed load center that brings power and signal to the
scoreboard. The harsher environment and outdoor electrical hookup requirements mandate
the use of this component. Refer to Drawing A-129998 along with the instructions below to
mount the load center in the display during installation.
1. Remove the lower left panels from the lowest digit module in the display, and
remove the nuts from the three screws already installed in the cabinet. If the load
center cover is on, remove it. Position the load center on the back panel screws, and
complete the mounting by tightening the nuts.
2. Route the cable from the load center into the driver enclosure and connect the 5-pin
jack to the mating plug.
Connection
Both power and signal cables are routed into the scoreboard from the rear via conduit.
All power and signal wiring terminates at the load center. Note that systems with radio
control do not require external signal wiring.
Refer to the electrical specification drawings listed in Appendix B to locate the front access
panel to the load center enclosure. Remove the screws to open the access panel. Remove the
metal cover of the load center to expose the components (Figure 5).