Samlexpower Evolution Series - Page 58

58 | SAMLEX AMERICA INC.
!
CAUTION!
As per American Boat and Yacht Council (ABYC) Standard E-11 for AC and DC Electrical Systems on Boats,
the size of DC side grounding wire shall not be smaller than one size under that required for current carrying
conductors supplying the device. Hence, for application on EVO™ on boat / yacht, the size of the DC side
grounding conductor should be of the same or one size smaller than the size of battery cable specied in Table 3.1.
!
ATTENTION!
Selon le « American Boat and Yacht Council » (ABYC) la norme E-11 pour le système électrique CA et
CC des bateaux, la taille du l de mise à la terre du côté CC ne doit pas être inférieure à un format sous
celle requise pour les conducteurs tenant le courant pour alimenter l'appareil. Par conséquent, pour
l’application EVO™ sur le bateau / yacht, la taille du conducteur de mise a terre côté CC devrait être de la
même ou strictement une taille plus petite que la taille du câble de batterie indiqué dans le tableau 3.1.
i
INFO
As described at Section 3.14, the metal frame / chassis of the EVO™ [Figs 3.12 and 3.13] is bonded to the
Earth Ground "GE" (Ground Rod) for AC side grounding. It may be argued that if the metal frame / chassis of
EVO™ is already bonded to Main Earth Ground "GE" for AC side grounding, why is it necessary to provide
additional DC side grounding wiring? [Wiring that bonds DC Grounding Terminals "5", "G-B" and GE in Figs
3.12 and 3.13]. If separate thicker grounding wire of the same size as the battery cable was not provided for
the DC side grounding and there was a ground fault in the battery circuit, very large DC fault current from
Battery+ would ow through the smaller size AC grounding wires to the Battery Negative through Earth
Ground. These smaller size AC side grounding wires would be damaged due to very high DC side fault current
(100A to 200A depending on the Model of the EVO™ being used).
A DC Side Grounding Connector (5) (5 in Figs 2.1 and 3.8) is provided for connecting to the System Ground. The
connector can accept wire sizes AWG # 4–6. The set screw size is M6.
A DC Distribution Panel, as shown in Figs 3.12 and 3.13, is normally provided to connect the batteries and distribute
DC power to the inverter and to the other DC loads.
The Negative of the battery is connected to the Neg (-) Bus of the DC Electrical Panel which, in turn, is connected to
its Grounding Bus Bar (G-B). Grounding Bus Bar G-B of the DC Electrical Panel is further bonded to the Grounding Bus
Bar "G-B" of the Grid Electrical Panel and then to the Grounding Electrode (GE), also called Ground Rod. Hence, the
Battery Negative, the chassis of the DC Electrical Panel and the metal chassis of the EVO™ will all be bonded to the
Earth Ground.
SECTION 3 | Installation