Section 3: power installation, 1 installation guidelines, Don’t – Daktronics Galaxy AF-3220 User Manual
Page 9: 2 conduit, 3 power requirements, Section 3, Power installation, Installation guidelines, Do: don’t, 2 conduit 3.3
Power Installation
5
Section 3: Power Installation
3.1 Installation Guidelines
DO:
• Route power to the display through a fused disconnect switch
• Route power conductors through conduit according to local codes
• Install an earth-ground electrode for each display face – if resistance to ground is greater than 10 ohms,
install additional grounding electrodes
• Follow local and national electrical codes
• Provide a main power disconnect for the displays
DON’T:
• Connect the display to any voltage other than that listed on the product label
• Share a circuit or neutral with any other electrical devices such as light ballasts, parking lights, etc.
• Connect the neutral to the ground at the disconnect or the display
• Use the display support structure as an earth-ground electrode
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
3
/
4
" threaded holes for use with
3
/
4
" conduit. Unthreaded
1
/
2
" knockout
holes are provided in the signal enclosures used with the display. If not using the provided enclosures, use
the knockout/drill holes provided in the display cabinet.
3.3 Power Requirements
Important Note:
• 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.
• Size conductors of circuits that deliver power to a Daktronics display according to local and national
electrical codes so that the power distribution system delivers full-load power to the display while
maintaining a voltage within five percent (5%) of the nominal voltage.