Daktronics LED Aquatics/Track Displays SW-2000 Series 10 Numeric Digit - Manual (Page 19)

Electrical Installation 13
3.4 Grounding Outdoor Displays
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 who is performing the electrical installation can verify ground
resistance. Daktronics Sales and Service personnel can also perform 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. The display must be
properly grounded or the warranty will be void.
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. The support structure of the display
cannot be used as an earth-ground electrode. The support is generally embedded in
concrete, and if it is in earth, the steel is usually primed or it corrodes, making it a
poor ground in either case.
3.5 Installing Load Centers, Outdoor Displays
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. The load center is mounted in the cabinet during
display installation. The procedure is as follows:
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 12-pin plug to the mating plug.
3. Insert 2" bushings into the holes between modules.
4. Pull the power/signal cable from the lower module up into the module above
it and connect the cable to the 12-pin plug on its driver.
5. Follow the same procedure for the other modules.
6. Make main power and signal connections in the load center (See the detail
of the unit's interior in the lower right corner of Drawing A-129998).
7. Replace covers and panels.