Sensata Magnum Energy MS Series, Owner'S Manual

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Page 42 © 2016 Sensata Technologies
Installation
2.7 Inverter Notifi cation 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 shut down in an emergency. There
are also specifi c requirements for this label/plaque depending on the inverter application, they
are as follows.
2.7.1 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.
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 2-26 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.
This electrical system is equipped with an Automatic
Generator Starting (AGS) device and/or an inverter.
Disconnect all AC and DC power to the AGS and/
or inverter before performing any service to the
electrical system. Failure to do so can result in shock
causing serious injury or death.
PN: 62-0002 Rev A
Figure 2-26, Warning Label
2.8 Final Inspection
1. Verify all cables/conduit runs are secured with wire ties or other non-conductive fasteners to
prevent chafi ng 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.
Important: If required by code, have the installation inspected by an electrical inspector.