Daktronics AB-1600-1.5,2.5 - Manual (Page 34)

Electrical Installation 3-8
3.5 Power Disconnect Switch
Route power to the display through a fused disconnect switch capable of opening all ungrounded power
conductors. Locate this disconnect within the line of sight of any personnel performing maintenance on
the display. If locating the disconnect out of sight of the display, it must be able to lock in the open
position.
Due to the inrush current (momentary surge) created by the display on start-up, Daktronics
recommends using oversized current devices, high magnetic breakers or time delay fuses to
handle the momentary surge.
The Over Current Protection Device needs to match the fault current available in the power
delivery circuit. To determine the available fault current of circuit, have qualified personnel
perform an onsite fault current survey at the site.
The National Electrical Code requires the Amp Inrush Current (AIC) rating of the electrical
equipment in a circuit match the available fault current in the electrical circuit.
Because each installation is unique, Daktronics offers these instructions as guidelines only.
Daktronics assumes no liability if installation steps have been omitted or other necessary
procedures are not included in this manual.
Daktronics is not responsible for the quality of the power delivery system to the display. It is the
customer’s responsibility to ensure the undertaking of proper safety measures. Power and signal
wiring in the display must comply with local, state and national electrical codes, with the correct
cabling procedures for the installation determined and followed.
3.6 Panelboard Assignments (Full Matrix Displays)
Reference Drawing:
Surge Suppresser Wiring ..........................................................................Drawing A-81039
A panelboard encompasses the electrical service point, circuit protection, and switching of the display
Figure 29: Installation with only Neutral Conductor provided