EG4 GRIDBOSS - Page 30

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NON-BACKUP LOADS PORT
The non-backup loads port is used to pass through power from the Grid input to loads that either do not
require backup or want to be purposely omitted from the backed-up loads so as not to overload the
inverter during an outage. Loads connected to this port will not have power during a grid outage. Using
smart ports may be a better option for loads that might overload the inverter upon start-up, but have the
advantage of being backed up if there is sufficient power from the inverters during a grid outage.
Reference the table below for wire size and torque recommendations when connecting the non-backup
port wiring.
BREAKER
SIZE
MAX. SUPPORTED
BREAKER SIZE
SUPPORTED WIRE SIZE
MAX. TORQUE
VALUE
TOOL SIZE
Lugs Lugs only
4 – 2/0 AWG
110 in-lbs. (12Nm)
5/16 in. (8 mm)
3/0 AWG – 250 kcmil
275 in-lbs. (31Nm)
5/16 in. (8 mm)
NOTE
:
The breaker above the non-backup port is not connected to the non-backup
port lugs and is not used by the non-backup port. This breaker is used when
activating manual bypass mode.
CAUTION
:
The non-backup port is not controlled by a breaker or relay and will always
receive current if the GridBOSS is supplied with grid input.
WARNING
:
The non-backup port does not have built-in overcurrent protection at the port
output. An external breaker MUST be installed with the proper amperage rating
to protect the wire size used. The breaker cannot exceed a 200A rating.