Figure 2-18, Multiple Connections To Dc Ground Rod (Method 2); Figure 2-19, Single Connection To Dc Ground Rod (Method 3) - Magnum Energy MS Series Owner's Manual

Installation
Method 2 (see fi gure 2-18): 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 can not be smaller than the largest conductor in the DC system (usually the battery-
to-inverter cable).
A C S e rvice
P a n e l
N e u tra l
G B B

Figure 2-18, Multiple Connections to DC Ground Rod (Method 2)

Method 3 (see fi gure 2-19): 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.
A C S e rvice
P a n e l
N e u tra l
G B B

Figure 2-19, Single Connection to DC Ground Rod (Method 3)

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A C E lec tric al S y s tem
M S -A E S e rie s In ve rte r/C h a rg e r
H ot
A C
G C
N eutr al
S B J
AC G r ound
E G C - A C
G rounding
G E C -A C
Grounding Electrode
(AC and D C sides shared)
A C E lec tric al S y s tem
M S -A E S e rie s In ve rte r/C h a rg e r
H ot
A C
G C
N eutr al
S B J
AC G r ound
E G C - A C
G E C -A C
G rounding
D C E lec tric al S y s tem
Positive
D C
G C
N egative
D C G r ound
E G C - D C
S y s tem
G E C -D C
G E
) copper. The reasoning for allowing
2
D C E lec tric al S y s tem
Positive
D C
G C
N egative
D C G r ound
E G C - D C
S y s tem
G E
Grounding Electrode
(D C side dedicated)
D C S e rvice
P a n e l
N e g a tive
S B J
G B B
D C S e rvice
P a n e l
N e g a tive
S B J
G B B
G E C -D C
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