Daktronics Galaxy AF-3155, Manual

Page: 27 / 87

3.6 Power
Reference Drawings:
Power Termination Box................................................ Drawing A-129227
Power Specs, 16x144-48x144 Displays ...................... Drawing A-183327
Schematic ................................................................ Refer to Appendix A
Power Requirements
Refer to Drawing A-183327 for voltage and current requirements for your display
size. Each uses a 120VAC or 120/240 VAC single-phase power source.
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 sign 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 proper 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 .
Figure 19: Display Grounding
Electrical Installation
3-7