Owner`s manual

Page 39
© 2010 Magnum Energy, Inc.
3.0 Installation
2. Multiple Connections to Ground - Single Electrode (Method 2): 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
(see Figure 3-20). 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).
3. Multiple Connections to Ground - Multiple Electrodes (Method 3): This method uses
a separate Grounding Electrode for the DC system and the AC system (see Figure 3-21). 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).
The DC Grounding Electrode (GE – DC) must be bonded to the AC Grounding Electrode (GE – AC)
to make a grounding electrode system; this Bonding Conductor (BC) cannot be smaller than the
largest grounding electrode conductor, either AC or DC.
Figure 3-20, Multiple Connections to DC Ground Rod (Method 2)
Figure
3-21, Multiple Connections to DC Ground Rod (Method 3)
DC
S
OURCE
MAIN AC PANEL
H OT 1
N
EUT
GND
H OT 2
DC SIDE
AC SIDE
MMP ENCLOSURE
AC
S
OURCE
AC and DC sides shared
DC Electrical
System
AC Electrical
System
Grounding System
GND
POS
N EG
GBB
GE
GEC-AC
GBB
M AGNUM
INVERTER
GEC-DC
SBJ
SBJ
GC-DC
GC-AC
HOT 1
HOT 2
NEUT
BAT
BAT
DC
S
OURCE
MAIN AC PANEL
H OT 1
N
EUT
GND
H OT 2
DC SIDE
AC SIDE
MMP ENCLOSURE
AC
S
OURCE
DC side dedicated
AC side dedicated
DC Electrical
System
AC Electrical
System
Grounding System
GND
POS
N EG
GBB
GE
GEC-AC
GE
GBB
M AGNUM
INVERTER
GEC-DC
BC
SBJ
SBJ
GC-DC
GC-AC
BAT
BAT
HOT 1
HOT 2
NEUT