Electrical Installation
7
4 Electrical Installation
Getting Started
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.
Power Installation
Qualified personnel must perform electrical installations to prevent injury to personnel
and damage to the equipment.
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
For installation with ground and neutral conductors provided, the power cable must
contain an isolated earth-ground conductor. Do not connect neutral to ground at the
disconnect or at the display; this violates electrical codes and voids the warranty. Use a
disconnect so all hot lines and neutral can be disconnected.
Bonding Screw
A bonding screw is included (not installed) with the panelboard. If the bonding screw is
required, install it to avoid violation of local and national codes.
Power Connections
Power enters the traffic cabinet and terminates at the traffic cabinet panelboard.
Route power and signal cables from the traffic cabinet to the display in conduit
approved by local and national codes. Terminate all wires as labeled in the termination
panels.
Traffic Cabinet Termination
The traffic 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 panelboard. The power cable must contain an earth-ground
conductor.
