Electrical Installation
7-1
Section 7: Electrical Installation
Electrical installation consists of the following processes:
l Providing power and ground to a disconnect near the scoreboard;
l Routing power and ground from the main disconnect to the scoreboard power and signal entrance
enclosure;
l Connecting the scoreboard ground to a grounding electrode at the scoreboard location;
l Routing the control signal cable from the control location to the scoreboard location.
K Note: Only qualified individuals should perform power routing and termination to the display. It is
the responsibility of the electrical contractor to ensure that all electrical work meets or exceeds local
and national codes.
7.1 Power Requirements
Reference Drawings:
Components 8/16 Pos Power and Signal Entrance ............................... Drawing A-109114
Components 2/4 Pos Power and Signal Entrance ................................. Drawing A-125977
Refer to the chart in Section 3 to determine circuit specifications and maximum power requirements for
the models described in this manual.
Daktronics outdoor scoreboards have been designed for easy access to components, and the power and
control signal hookup has been simplified. Front panels are removable to allow access to the digits,
cabling and other components.
Correct power installation is imperative for proper display operation. The following subsections give
details of display power installation.
Grounding
Displays MUST be grounded according to the provisions outlined in Article 250 of the
National Electrical Code
®
. Daktronics recommends a resistance to ground of 10 ohms or less.
The display system must be connected to earth-ground. 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 of an earth-ground electrode differs from region to region and from 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 in earth, the steel is usually primed or it corrodes, making it
a poor ground in either case.
Branch Circuit Grounding
A grounding electrode at separate structures/displays will not be required where only one
branch circuit supplies the structure and the branch circuit includes an equipment-grounding
conductor for grounding the non-current-carrying parts of all equipment.
To Next Page
Loading...
Need help?
General
