Daktronics AF-3080-68-R,A - Manual (Page 31)

Power Installation
There are two considerations for power installation: installation with ground and
neutral conductors provided, and installation with only a neutral conductor provided.
These two power installations differ slightly, as described in the following
paragraphs:
Ins allation w th Ground and Neutral Conductors Provided t i
For this type of installation, the power cable must contain an isolated earth-ground
conductor. Under this circumstance, do not connect neutral to ground at the
disconnect or at the display. This would violate electrical codes and void the
warranty. Use a disconnect so that all hot lines and neutral can be disconnected.
Refer to Figure 22 below for installation details. The National Electrical Code
requires the use of a lockable power disconnect within sight of or at the display.
Figure 22: Installation with Ground and Neutral Conductor Provided
Electrical Installation
3-7