Daktronics Galaxy AF-3500 Series 46 mm - Manual (Page 14)

10 Power Installation
Main Disconnect
 Daktronics requires using a disconnect switch so that all ungrounded conductors can be
disconnected near the point of power connection.
 Place the disconnect switch in direct line of sight from the display, unless it can be locked
in the open position. This ensures power remains off while service personnel work on the
display.
3.4 Grounding
 Ground displays according to the provisions outlined in local and national electrical
codes. Install with the ground and neutral conductors provided.
Note: Do not connect neutral to ground at the disconnect switch or at the display. This
violates electrical codes and voids the warranty.
 Connect the display system to the earth ground, as shown in Figure 10. Proper
grounding protects the equipment from electrical disturbances and lightning.
 Daktronics requires a resistance to ground of 10 ohms or less. Failure to ground the
display properly voids the warranty.
Important Points about Grounding
 Resistance to ground 10 ohms or less: This is required by Daktronics for proper display
performance. If the resistance to ground is higher than 10 ohms, install additional
grounding electrodes to reduce the resistance. The grounding electrode should be
installed within 25' (7.6 m) of the base of the display and must be connected to the
ground lug on the back of the display. Refer to Figure 10.
 Follow local and national codes: The material of an earth-ground electrode differs from
region to region and for conditions present at the site. Consult any local and national
electrical codes that may apply.
Figure 10: Correct Grounding