Daktronics AB-1010 - Manual (Page 19)

Electrical Installation 3-3
e required where only one
branch circuit supplies the structure and the branch circuit includes an equipment grounding
conductor for grounding the non-current-carrying parts of all equipment.
Installation with Ground and Neutral Conductors Provided
the disconnect or at the display.
This violates electrical codes and voids the warranty. Use a disconnect so that all hot lines and
fer to Figure 14 for installation details; the National Electrical
t within sight of or at the display.
with article 250-32 of
f the requirements of
ust be observed:
Branch Circuit Grounding
A grounding electrode at separate structures/displays shall not b
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:
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
neutral can be disconnected. Re
Code requires the use of a lockable power disconnec
Installation with Only a Neutral Conductor Provided
Installations where no grounding conductor is provided must comply
the National Electrical Code. If the installation in question meets all o
article 250-32, the following guidelines m
Figure 14: Installation with Ground and Neutral Conductor Provid ed
Figure 15: Installation with only Neutral Conductor Provided