Daktronics CH-1436H - Manual (Page 10)

The power cable must contain a separate earth-ground conductor. When a separate
ground conductor is used, do not connect neutral to ground at the disconnect or at the
display. This would violate electrical codes and void the warranty. Refer to Figure
1.
2.5.2 Existing Power Installation
When a separate ground conductor is not available, connect the neutral to the earth-
ground at the disconnect, never at the display. Refer to Figure 2.
Figure 1: New Power Installation
Figure 2: Old Power Installation
Installation 2-4