Regal 42SC Owner's Manual page 96

TYPICAL GALVANIC ISOLATOR
As part of the AC boat circuitry he green ground wire
takes a different path. It exits the yacht shore power inlet
or cord reel and travels to a galvanic isolator. See the il-
lustration.
A 60 amp (60 hertz) galvanic isolator for domestic use is
connected in series with the AC grounding "green" wire.
lator allows AC voltage to travel back to the green ground
wire at the marina power center in the event a short ex-
ists on the boat. Also, the isolator blocks any DC current
from traveling on the green ground wire. This eliminates
the possibility of galvanic interaction from other boats in
the vicinity.
The green ground or "bonding wire" runs from the
yacht's shore power inlet or optional cord reel to the gal-
vanic isolator. From the output of the galvanic isolator it
runs to the AC ground buss located behind the AC main
control panel in the salon.
Since the galvanic isolator is not polarized either termi-
nal can be used for the inlet or output side for the green
grounding wire. See the illustration.
There is a fan located inside the isolator. If you ever hear
the fan running the isolator has failed. Disconnect the
shore power from the boat and check the system. Call
your closest Regal yacht dealer for more information.
Do not to store objects inside the locker that might in-
hibit air fl ow to the galvanic isolator fan.
Note that the galvanic isolator system is also used in
yachts using the 50 amp main breaker (no ELCI). Nor-
mally the galvanic isolator is found in the engine room
sometimes called the bilge or sump.
Overseas yachts use a 30
amp (50 hertz) galvanic
isolator.
The purpose of the gal-
vanic isolator is to isolate
the yacht's grounding sys-
tem from the shorepower
ground. The galvanic iso-
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Systems