Daktronics DF-12xx - Manual (Page 13)

Electrical Installation 2-1
Section 2: Electrical Installation
Only qualified individuals should perform power routing and termination to the
display. It is the responsibility of the electrical contractor to ensure that all
electrical work meets or exceeds local and national codes.
2.1 Preparing for Power/Signal Connection
Reference Drawing:
Shop Dwg, DF-1219, 18” Drop-in w/ BL Grade ID ......Drawing B-225876
Electrical installation consists of the following processes:
• Providing power and ground to a disconnect near the display.
• Routing power and ground from the main disconnect to the display
driver/power enclosure.
• Connecting the display ground to a grounding electrode at the sign location.
• Routing the control signal cable from the control location to the sign
location.
Drawing B-225876 provides detailed instructions for power and signal connections
for the display, including hookup of the connections between host and client
displays. Refer to this drawing before undertaking any part of the electrical
installation.
2.2 Power and Grounding Connections
Correct power and grounding installation is imperative for proper display operation.
The subsections that follow give details of display power installation. Only qualified
individuals should attempt to complete the electrical installation. Improper
installation could result in serious damage to the equipment and could be hazardous
to personnel.
The DataMaster, Gas Price displays require a dedicated, 120 V/15 A circuit for
incoming power. The display itself has no breakers or fuses.
WARNING: It is critical that the display circuit be fused at 15 A, and that all
conductors used must be designed to pass a 15 A current in normal operation.
Failure to meet wiring and over current protection device requirements is a
violation of the National Electrical Code
® and will void the display warranty.
Grounding
Reference Drawings:
Enclosed Driver, 4 Column Reference ........................Drawing A-184918
Displays MUST be grounded according to the provisions outlined in Article 250 of
the National Electrical Code and according to the specifications in this manual.
Daktronics requires a resistance-to-ground of 10 ohms or less.