Magnum Energy Magnum Panel (MP Series) - Manual (Page 60)

© 2011 Magnum Energy, Inc. Page 53
3.0 Installation
3.9 Removing the NEUTRAL-GROUND Wire
The MP enclosure is shipped with the AC neutral connected to ground to provide the single point
of ground for the AC system. The neutral to ground connection is done by connecting a green wire
(Item 19, in Figures 2-7 and 2-8, Item 23 in Figure 2-9, or Item 13 in Figure 2-10a, depending on
your MP model) between the AC NEUTRAL busbar and the GROUND busbar inside the MP enclosure.
In installations where the MP enclosure is powered from utility power or large permanently installed
generator systems, the AC neutral to ground connection is normally provided inside the main AC
electrical distribution panel. In these installations, the factory-installed NEUTRAL-GROUND wire in
the MP enclosure must be removed to prevent multiple neutral to ground connections.
To remove the NEUTRAL-GROUND wire:
1. See Figure 3-28 below to help you locate the green wire with the NEUTRAL-GROUND CONNEC-
TION label inside your MP enclosure.
2. Remove this green wire by loosening the screws on the AC NEUTRAL busbar and the GROUND
busbar.
3. After this wire is removed, tighten the loose screws back into the busbars to prevent them
from being lost.
Figure 3-28, Removing the NEUTRAL-GROUND Wire
NEUTRAL-GROUND
Wire inside
MPSL/MPSH
NEUTRAL-GROUND Wire
inside MPDH (AC Side)
NEUTRAL-
GROUND
CONNECTION
(green wire)
AC
NEUTRAL
Busbar
GROUND
Busbar