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July 21, 2012
ELECTRICAL SYSTEMS:
A. 120 @ 2 4 0 VOLT SYSTEM : power sources and discussion
120 Volt electricity is used to run TV/VCRs, Convenience Outlets
Microwave and one of the two 24 volt Battery Chargers , etc.
The 240 volt circuits run the Cooktop/ Oven Washer/ Dryer / Water maker
and The other of the two 24 volt Battery Chargers
• The 120 volt system breakers are in the cabinet in the pilot house helm on the
Starboard side aft of the pilothouse door. The 110 volt breakers are located at the
base of the panel, directly below the 240 volt breakers.
• Breaker switches for shore power or Ship (generator power) are located in this
panel in the center just under the Voltage Meter. The breaker switch is set up
with a slide cover so that only one source can be used at a time.
• 240 volt power can be obtained from two sources.
1.
Shore power 50 amp plug
2.
Shore power from two 30amp plugs using the Y adapter( must be 120/240
volts shore power with each 30 amps sourced from a different leg of the 240V
service)
3. generator
120 volt power can be obtained from three sources.
1.
Leg one of a 240 service (50 AMP Shore power)
2.
Leg two of the 240 volt service (50 AMP Shore power)
3.
Both legs as single source 120 volts when the 50
amp to 30 amp single adapter is used .
4.
Both legs as separate 120 volt sources when the
2@30 amp to 50 amp “Y” adapter is used
5. Inverter ( feeds both of the two120v panel areas) but none of the 240 panel
area is available
There are 2 sections of the 120 volt panel area , the upper section draws power
from the second leg of the 240 current and the lower section from the other.
Note: When using the Y- 2@30 amp to 50 amp adapter ( when no 240/120 50 amp
shore power is available) each 30 amp leg must be from a different leg of a 240volt
dock wiring system which will give you a 240 volt source. When the single 30
amp to 50 amp adapter is used both sections of the 120 volt panel are active but
with only 30 amps.
