Electrical Installation
8
5 Electrical Installation
Getting Started
Qualified personnel must perform electrical installations to prevent injury to personnel
and damage to the equipment.
Daktronics engineering staff must approve any changes made to the display. Before
altering the display, submit detailed drawings for the proposed modifications to the
Daktronics engineering staff for evaluation and approval, or the warranty will be void.
All DDMS cabinets must be grounded according to all local and national electrical
codes.
Daktronics recommends that a separate circuit be run to the electronic display(s) to
isolate it and prevent any issues that could be caused by line voltage fluctuations or
high frequency noise on the power line caused by other types of equipment. A separate
circuit also makes display maintenance and troubleshooting easier. Daktronics assumes
no liability for any issues caused by line voltage fluctuations or other improper power
conditions if these recommendations are not followed.
AC Power for Sets with One DDMS Cabinet
Use this section for sets that have only one DDMS cabinet (excluding LIEs). For information
on LIE connections, refer to
.
Grounding
All components of a display system—including but not limited to displays, control
equipment, and connected peripheral equipment—must be electrically grounded.
Only qualified individuals may perform electrical work, including verification of ground
resistance. Daktronics is not responsible for improper grounding or damage incurred as a
result of improper grounding.
Grounding methods must meet the provisions of all applicable local and national codes.
Inspect and verify all grounding methods meet the provisions of all applicable local and
national codes.
Proper grounding is necessary for reliable equipment operation and general electrical
safety. Failure to properly ground the display system may void the warranty, disrupt
operation, damage equipment, and cause bodily harm or death.
Power
The DDMS cabinet operates on 120/240 VAC 3-wire plus ground, single-phase power.
Utility power routes through the open area in the bottom of the cabinet. Terminate the
AC power at the power entry box. The power cable must contain an earth-ground
conductor.
To make AC power connections at a power and control enclosure:
1.
Remove the power entry box cover to reveal the terminal blocks.
2.
Route the power cables through the bushing and into the power entry box.
3.
Terminate each wire at the appropriate terminal block section and earth ground lug.
