MS Series Owner's Manual - Magnum Energy

2.7 Inverter Notification Requirements
Installation
When an inverter is installed in a building, facility or structure, the NEC (National Electrical Code)
requires a label or plaque to be provided. This label/plaque is required to be easily visible and
provide information that informs personnel on the location of all electrical system disconnects.
This is to ensure all power to a building is quickly located and shutdown in an emergency. There
are also specific requirements for this label/plaque depending on the inverter application, they
are as follows.
2.7.1 Facilities with Stand-alone Systems
Any building, facility, or structure with a photovoltaic power system that is not connected to a
utility service source and is a standalone system must have a permanent plaque or directory
installed on the exterior of the building or structure at a readily visible location acceptable to the
Authority Having Jurisdiction (AHJ). The plaque or directory must provide the location of system
disconnecting means and information regarding whether the structure contains a standalone
electrical power system.
2.7.2 Facilities with Utility Services and PV Systems
Buildings, facilities, or structures with both utility service and a photovoltaic system must have a
permanent plaque or directory providing the location of the service disconnecting means and the
photovoltaic system disconnecting means if they are not located at the same location.
2.7.3 Inverter Warning Label
A warning label as shown in figure 2-24 is provided to inform all personnel that an inverter is
installed in your electrical system. Affix this label in a clearly visible location at the electrical panel
that is being powered by the inverter. This is because it might be falsely assumed that the panel is
no longer “hot” after the AC power has been shut off, when power may actually still be available
due to the inverter automatically powering the panel.
This electrical system
is
is equipped
with
with
an
an
Automatic
Automatic
Generator Starting (AGS) device device and/or and/or an an inverter. inverter.
Disconnect all all AC AC and and DC DC power to to the the AGS AGS and/or and/or
inverter before performing any any service to to the the electrical
system. Failure to to do do so so can can result in in shock shock causing
serio us i njury or de ath .
Figure 2-24, Warning Label
PN:62-0002 Rev A
2.8 Final Inspection
1. Verify all cables/conduit runs are secured with wire ties or other non conductive fasteners to
prevent chafing or damage from movement and vibration.
2. Verify strain reliefs or grommets are in place to prevent damage to the wiring or conduit where
it passes through walls, bulkheads or other openings.
3. Verify all AC connections are correct and torqued to a maximum of 16 in lbf (1.8 N-m).
4. Replace the covers on the main electrical/distribution panel.
5. Replace the chassis access cover.
6. Verify the inverter’s front panel switch is in the “OFF” position.
Info: If required by code, have the installation inspected by an electrical inspector.
© 2009 Magnum Energy Inc.
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