War ning – Magnum Energy MS-AEJ Series User Manual

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2.5 Inverter Warning Label

A warning label is provided to inform all personnel that an inverter is installed in your electrical

system. Affi x 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.

WAR NING

This electrical system is equipped with an Inverter and /or
Automatic Generator Starting (AGS) device. Disconnect all
AC and DC power to the inverter and /or the AGS before
performing any service to the electrical system . Failure to
do so can result in shock causing serious injury or death.

WAR NING

Figure 2-14, Warning Label

2.5.1 Inverter Power Identifi cation and Disconnect Location Requirements
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 specifi c requirements for this label/plaque depending on the inverter application, they are:
(A) Facilities with Standalone 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.
(B) 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.

Installation