Product Manual
52 | SAMLEX AMERICA INC.
chassis in an RV / motorhome / caravan. When this energized exposed surface is touched, the
voltage will drive current through the body to Earth Ground producing electric shock. When
properly grounded to Earth Ground (or Frame / Chassis Ground in motorhome or caravan),
the Leakage Current Protection Device (like RCD, GFCI etc.) or Over Current Protection Device
(like Circuit Breaker or Fuse) will trip and interrupt the circuit feeding power from the AC
source (EVO
TM
/ AC Input) or the DC source (12V / 24V battery). Proper grounding will ensure
that all exposed metal surfaces will have equal potential and will be bonded to (i) a single
common Earth Ground point i.e. the Ground Rod / buried metallic water / gas pipe at the
premises or (ii) the Frame / Chassis Ground in a motorhome / caravan.
Please read following on-line White Papers for complete understanding of Grounding
at www.samlexamerica.com (Home > Support > White Papers):
• “Grounded Electrical Power Distribution"
• “Grounding System and Lightning / Ground Fault Protection”
3.12 GROUNDING ARRANGEMENT
Internally, EVO
TM
consists of DC and AC Section that are isolated through a transformer
(See these sections in Figs 3.12 and 3.13). Both these sections are required to be grounded
appropriately.
For wiring details for appropriate grounding, refer to Figs 3.12 and 3.13, and associated
explanation under Section 3.13 and 3.14.
When using a generator instead of Grid, please ensure that the Neutral of the generator is
bonded to the metal frame of the generator and the metal frame of the generator is bonded
to Earth Ground through the Grounding Electrode (GE) i.e. the Ground Rod. Refer to Section
3.14.1 for additional details.
3.13 DC SIDE GROUNDING
Please refer to Figs 3.12 and 3.13.
DC side grounding involves bonding of the metal frame/chassis of EVO
TM
, the metal chassis
of the DC Electrical Panel and the Battery Negative Terminal to Earth Ground in shore based
installation (Fig 3.12) or to the metal frame / “Chassis ” of the motorhome / caravan
(Fig 3.13). This ensures that in case of a ground fault in the +12V / +24V circuit, the fuse in
the +Battery line blows to clear the fault. This fuse in the +Battery line has Ampere capacity
matching the rated DC input current of the EVO
TM
in Inverter Mode. The wire size used for DC
side grounding should be minimum AWG #6 or of the same size as the battery cable, which-
ever is thicker (Battery cable size should have minimum Ampacity ≥ the Ampere rating of this
battery fuse depending upon the model of the EVO
TM
being used). This recommendation
on sizing of the DC Side Grounding Wire will be superseded by the National / Local
Electrical Codes.
!
CAUTION!
As per American Boat and Yacht Council (ABYC) Standard E-11 for AC and DC Electri-
cal 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
TM
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 specied in Table 3.1.
SECTION 3 | Installation