Owner's Handbook

18 Pathfinder Radar Scanners
maximum power cable extensions are given in the table below. These
figures relate to the total cable extension, from the end of the supplied
1.5 m power cable to the system battery terminals. Do not exceed
these lengths as unreliable operation may result.
Note: If the required extension results in unacceptably large diame-
ter cables, use two or more smaller gauge wires to achieve the re-
quired copper wire cross-section. For example, using two pairs of
2mm
2
is equivalent to using two single 4.0 mm
2
cables.
24 V and 32 V systems
These systems are less sensitive than 12 V systems to voltage loss in
the power cables. However, it is still necessary to use adequate cables
to prevent excessive power loss. The table below gives the
recommended wire gauge for different power cable extension
lengths. Raymarine recommends that power is fed directly from the
output of the battery isolator switch via its own dedicated cable
system.
CAUTION:
The display unit does not include a fuse for scanner power, so an
in-line fuse or circuit breaker MUST be included in the power
cable.
Note: If the required extension results in unacceptably large diame-
ter cables, use two or more smaller gauge wires to achieve the re-
quired copper wire cross-section. For example, using two pairs of 2
mm
2
is equivalent to using two single 4.0 mm
2
cables.
Table 1-7: Max. Extension Power Cable Lengths (m), 12 V Systems -
4 kW scanners
Power Cable Core Size (each core)
mm
2
:
AWG:
4.0
11
6.0
10
8.0
8
10.0
7
4 kW Scanners <3.0 4.5 6.0 7.5