Preparing For Installation
18
XPLORE 120/12 Battery Charger Owner's Guide
Wiring Requirements
DANGER
ELECTRICAL SHOCK AND FIRE HAZARD
Do not operate the battery charger with damaged or substandard
wiring. Make sure that all wiring is in good condition and is not
undersized. See notes below.
Failure to follow these instructions will result in death or serious
injury.
NOTES:
Wiring and fuse sizes are governed by electrical codes and
standards. Different requirements apply in different countries and to
different types of marine installations, for example, commercial or
recreational. It is the responsibility of the installer to ensure that
each installation complies with all applicable codes and standards.
Ensure that wires and fuses or breaker disconnects are correctly
sized. Maximum continuous DC current available from the charger
may be an additional 6–10% above the nominal current rating of
the charger.
DC Equipment Grounding
The equipment ground/earth cable size must not be smaller than
one gauge size than the supply cable. For more information, see
DC equipment ground cable size on page 25
DC (Battery) Wiring
The following tables show some typical wire sizes for various
cable length runs, based on 3% voltage drop on DC cables, 167 °F
(75 °C) rated wire with wiring being inside the engine compartment
– assumed ambient of 122 °F (50 °C).
Wire Length
(max length one way)
Wire Size
(AWG and
mm
2
)
Wire Size
(AWG and
mm
2
)
feet
meters
120A
Z
40A
Z
5 ft
1.5 m
No. 4
(21.2 mm
2
)
n/a
7.5 ft
2.25 m
No. 3
(26.7 mm
2
)
n/a
10 ft
3.05 m
n/a
No. 6
(13.3 mm
2
)
Table 1 Battery Cable Examples
NOTE
: Extending the DC cable length beyond 7.5 feet (2.25 m)
will affect charging effectiveness as a result of a voltage drop.
Summary of Contents for 819-0120-12
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