MidNite Solar MNROSIE7048M, Owner'S Manual

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MNROSIE7048 MANUAL
24| P a g e 1 0 - 4 3 2 - 1 R E V : -
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If you have two ground rods - AC goes to one and DC goes to the other - then you
HAVE to bond those two ground rods together with a Bonding Conductor (BC). The
NEC also dictates the proper size of that BC.
•
The
easiest
way to wire your ground system, and one that the NEC allows the smallest size
of GEC, is shown in Figure 10 below.
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Notice the single GEC-DC conductor (#8) – one connection in this entire system to
the ground rod.
Ground Wire Gauges for
Rosie
•
#1 – #6 AWG
. System
Bonding Jumper (SBJ).
Determined by the size of
the AC current carrying wire,
which is also
#6 AWG .
•
#2 – #6 AWG
. Grounding
Conductor (GC). AC wiring
(Neutral and Hots) on the Rosie need to be a minimum of
#6 AWG . If you elect to go larger,
then the SBJ can still be #6 AWG
.
•
#3 – #8 AWG
. Grounding Electrode Conductor (GEC). Determined by the gauge of the
GC-AC. NEC allows #8 AWG GEC if the GC-AC is # 6 AWG .
•
#4 – #8 AWG
. Equipment Grounding Conductor (EGC-AC). Determined by the size of the
over-current device, which is the 60A AC breakers.
•
#5 – #4 AWG
. Equipment Grounding Conductor (EGC-DC). Determined by the size of the
DC over- current device, which is Rosie’s 300A battery breaker.
•
#6 – #3/0 AWG
. Grounding Conductor (GC). Rosie Batt+ and Batt- cables are #3/0 AWG .
Determined by the max current the Rosie can demand from the battery bank.
•
#7 – #6 AWG
. System Bonding Jumper (SBJ). Sizing is determined by the size of the GEC
(GEC-DC), #8, due to this system having a common ground busbar amongst the AC and DC
systems
AND only ONE GEC (the GEC-DC).
•
#8 – #6 AWG
. Grounding Electrode Conductor (GEC-DC). Because the grounding system
has a common ground busbar (in the DC panel) and all EGCs, SBJs, and GECs are connected
to that ground busbar, and the system has only one GEC (the GEC-DC) to the ground rod,
the NEC allows for
#6 AWG wire.
Rosie Inverter/Charger
Figure 10
Earth
#1
#3
#4 #5
#6
#7
#8
#2