Electrical Installation
6
2�
Connect a copper wire from the grounding electrode to the ground lug on the rear
of the display.
3�
Bury any copper cable or grounding electrodes so they are below grade.
Important Points About 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 Connection
Power is most often terminated to the J-box on displays. However, larger displays require
power to be terminated internally in the Power Termination Panel.
Displays With an External Power Termination J-box
To terminate hot, neutral, and ground wires at the
J-box, follow these steps:
1�
Route the power cable through conduit to the
rear of the display and into the power
termination J-box [the J-box contains
3
/
4
"
threaded conduit fitting(s)].
Note:
The J-box contains two or three wires
plus a ground coming from the power
termination panel inside the display.
2�
Inside the J-box, connect the power wires to
the wires coming from the display interior using
for 120 VAC and
The following colors are used for the pre-
terminated wires:
120 VAC
120/240 VAC
Line 1 – Black
Line 1 – Black
Line 2 – Red
Neutral – White
Neutral – White
Ground – Green/Yellow Ground – Green/Yellow
120 V Termination
(Box with Cover Removed)
Wiring from power termination
panel inside display
Line 1 – Black
Neutral – White
Ground – Green/Yellow
Figure 3:
120 V J-box Termination
120/240 VAC Termination
(Box with Cover Removed)
Wiring from power termination
panel inside display
Line 1 – Black
Line 2 – Red
Neutral – White
Ground –
Green/Yellow
Figure 4:
120/240 V J-box Termination
