Regal 38 SAV 2019, Owner'S Manual

Page: 97 / 297

97
As part of the AC boat circuitry the green ground
wire takes a different path. It enters via the boat’s
shore power inlet and travels to a galvanic isolator.
Isolator is located behind the cabin main AC panel.
A 60 amp (60 hertz) galvan-
ic isolator for domestic use
is connected in series with
the AC grounding “green”
wire. The purpose of the
galvanic isolator is to iso-
late the boat’s grounding system electrically from
the dock and other vessels below 1.4 volts but to
maintain a connection to the shore green ground
at high voltage potentials. The low voltage isola-
tion will prevent the vessel’s zinc from protecting
the underwater metal hardware on another ves-
sel sharing the same AC common green ground
wire. This eliminates the possibility of galvanic in-
teraction from other boats on the same dock cir-
cuit and permits your anodes to protect your boat.
The green ground or “bonding wire” runs from the
boat’s shore power inlet to a galvanic isolator stud.
From the other stud of the galvanic isolator it runs
to the AC ground buss located behind the AC
main ship’s control panel in the salon. Note that
the stud nuts must be torqued and maintained at
8.8 inch pounds.
Since the galvanic isolator is not polarized either
terminal can be used for the inlet or outlet side for
the green grounding wire. See the illustration.
There is a fan located at the right side of the isola-
tor identified by an array of ventilation holes. If you
ever hear the fan running the isolator has failed.
Disconnect shore power at boat & check system.
Galvanic Isolator (Typical)
Precautions/Galvanic Isolator Warnings
Warning- It is extremely dangerous to swim or be
in the marina water due to potential AC current
that may be present in the water. Take all neces-
sary precautions as this may be life threatening.
Caution- This device does not provide a status
monitor. Following a lightning strike this unit may
not continue to provide galvanic isolation protec-
tion.
Warning: The fan will operate only when there is a
fault to ground and the isolator is conducting cur-
rent. If you notice the fan running immediately dis-
connect the shore power and contact a qualified
marine electrician to isolate and repair the problem
with the boat or the shore power connection. Re-
member, never cover the fan holes.
Caution: Never test the galvanic isolator. Trouble-
shooting the galvanic isolator shall be done by
qualified personnel only.
Typical Isolator Wiring