Figure 2-19, Multiple Connections To Dc Ground Rod (Method 2); Figure 2-20, Single Connection To Dc Ground Rod (Method 3) - Sensata Magnum-Dimensions MagnaSine MS-G Series Owner's Manual

Method 2 (Figure 2-19): When the AC and DC service panels are near each other, then the AC
grounding electrode conductor (GEC–AC) and DC grounding electrode conductor (GEC–DC) can be
connected to a single grounding electrode. In this method—since there are multiple connections to
the DC grounding electrode (GEC–DC)—the size of the DC grounding electrode conductor cannot
be smaller than the largest conductor in the DC system (usually the battery-to-inverter cable).
AC Electrical System
AC Service
Panel
Neutral
GBB

Figure 2-19, Multiple Connections to DC Ground Rod (Method 2)

Method 3 (Figure 2-20): The AC grounding electrode conductor (GEC–AC) is bonded to the DC
ground point and the DC grounding electrode conductor (GEC–DC) is the only connection to the
grounding electrode, which must be a rod, pipe, or plate electrode.
In this method, since there is only one connection to the ground rod, the DC grounding electrode
conductor is not required to be larger than #6 AWG (13 mm
this smaller grounding electrode conductor is that it is only required to stabilize the system voltage
with respect to earth, and the other properly-sized conductors in each electrical system will safely
carry any fault currents if they occur.
AC Service
GBB

Figure 2-20, Single Connection to DC Ground Rod (Method 3)

© 2015 Sensata Technologies
MS Series Inverter/Charger
Hot
AC
GC
Neutral
SBJ
AC Ground
EGC - AC
Grounding
GEC-AC
Grounding Electrode
(AC and DC sides shared)
AC Electrical System
MS Series Inverter/Charger
Panel
Hot
AC
Neutral
GC
Neutral
SBJ
AC Ground
EGC - AC
GEC-AC
DC Electrical System
Positive
DC
GC
Negative
DC Ground
EGC - DC
System
GEC-DC
GE
) copper. The reasoning for allowing
2
DC Electrical System
Positive
DC
GC
Negative
DC Ground
EGC - DC
Grounding
System
Grounding Electrode
(DC side dedicated)
Installation
DC Service
Panel
Negative
SBJ
GBB
DC Service
Panel
Negative
SBJ
GBB
GE
GEC-DC
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