Electrical Installation
3-3
3.2 Conduit
Daktronics
does not
include the conduit. Separate conduit must be used to route:
•
Power
•
Signal IN wires to the signal termination enclosure, when applicable
•
Signal OUT wires (if not using the provided interconnect cable)
The power J-box is provided with ¾
”
threaded holes for use with ¾
”
conduit.
Unthreaded knockout holes are provided in the signal enclosures used with the
display. If necessary, there are knockout/drill holes in the display itself when not
using the provided enclosures.
For displays with more than one face, signal wiring between displays is normally
done using a quick connect interconnect cable (length 6 feet).
3.3 Preparing for Power/Signal Connection
1.
Enclosures are provided with the display for termination of power. Signal
termination is dependent upon communication type.
2.
Route power to the display through a fused disconnect switch capable of
opening all ungrounded power conductors – install this disconnect within
the line-of-sight of any personnel performing maintenance on the display (if
the disconnect is located out of sight of the display, it must be capable of
being locked in the open position)
Note:
Displays are equipped with supplemental protection devices that carry a
UL1077 (IEC 60947, VDE 660)
rating. These devices are only intended to protect
the components within the display. Suitable devices must be used for the equipment
and feeders supplying power to the display.
3.
Power conductors from the disconnect to the display should be routed
through conduit in agreement with local code
4.
Display power will terminate to the display at the external power
termination J-box mounted to the back of the display
5.
Connect the grounding electrode conductor, at the grounding lug, to the
display at this time
6.
Both signal communication interfaces will complete connection with a
quick connect cable. Refer to Section
for more detailed connection
information
Note:
Daktronics strongly recommends that the quick connect cable be secured to
protect it from weather or vandalism.
