Daktronics AF-3160-34-R,A - Manual (Page 24)

Electrical Installation 3-6
6. Power conductors from the disconnect to the display should be routed
through conduit in agreement with local code.
7. You may route the signal cable from the control computer to the display at
this time also. Be sure to run the power and signal cables in a separate
conduit.
3.6 Power
Power Requirements
Reference Drawings:
Power Specs, 8x48-48x128 Displays, 3 LED Pixel ..... Drawing A-179874
Power Specs, 8x48-48x128 Displays, 4 LED Pixel ..... Drawing A-179875
Power Specs, 8x48-48x128 Displays, RG .................. Drawing A-179876
Refer to the appropriate Power Spec Drawing for voltage and current requirements
for your display. Each uses a 120VAC or 120/240 VAC single-phase power source.
Depending on the module color and display size the power supply may vary.
Do not connect the displays to any voltage other than that listed on the
Daktronics product label.
Proper power installation is imperative for proper display operation. The following
sub-sections give details of display power installation.
Grounding
This display is intended to be installed in accordance with the requirements of
Article 600 of the National Electrical Code and/or other applicable local codes.
This includes grounding and bonding of the sign.
Displays must be grounded according to the provisions outlined in Article 250 of the
National Electrical Code
® . Daktronics requires 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 either primed or it corrodes, making it a poor ground.