Tayana VANCOUVER 42, Operation And Maintenance Manual

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NOTE : Many boats will have “upgraded” alternator systems in order to more quickly
charge the larger banks of batteries used on cruising boats. These systems will have
their own unique wiring diagrams.
d. Electrical Starter
The engine starter motor is the most demanding load that will be placed on the
electrical system and is not fused or protected by an overload device. Therefore, it is
wise to make periodic checks on the connections at the starter and solenoid switch for
tightness and cleanliness. Do not allow tools or other metal objects to come into
contact with these connections while the battery is on.
e. Wire Runs
Wiring in your yacht is generally carried through wiring conduits. These conduits
protect the wires from wear or impact. The color code used is shown in Table V-1.
Where wiring is exposed, it should be checked to see that it is clear of potential harm.
Terminal blocks and other exposed wire termination points should be sprayed with
WD-40 or similar moisture eliminating product. It is very important to note that you
should never, repeat never, disconnect wiring or plumbing for that matter without
drawing your own schematic of how they were installed first. Also, make sure each
line is tagged using waterproof labels. Trying to reconnect later will be your worst
nightmare come true, if you do not! It is very convenient to keep a “smart book” with
all these schematics, part numbers, phone numbers, addresses, etc. This book will
become increasingly important over the years! For example, when you replace the
anchor light bulb, write down the type in your smart book, so you don’t have to go up
again later just to see what type you have to buy.
2. The 110 Volt AC System
The 110 volt AC electrical system is connected to the shore power system. Its functions are
primarily water, heat, battery charge, power outlets, and sometimes refrigeration and air
conditioning. The service capacity is thirty amperes and the system is protected to that level.
There is little maintenance that the average owner should do. Whenever working on the back of
the panel, it is wise to shut down 110 power. Remember, a yacht is a damp environment, and
this tends to increase the dangers of electric power. The 110 volt system is grounded in the yacht
and this ground should remain. Remember – AC circuits and electricity can be lethal!
3. Protective Systems
Your yacht is bonded to help prevent galvanic corrosion. All metal parts of the yacht that
might come in contact with salt water are bonded by electrical wires with green insulation in
order to provide a low resistance electrical path for stray currents. Thus, there is a reduced
likelihood of current running through the salt water “electrolyte” and destroying the metal parts.
The bonding system should be checked to make sure that all of the connections are good and
clean. Incidentally, it appears that this bonding also helps keep your boat a less inviting target
for lightning when sitting in the water. A typical electrical bonding system is shown in Figure V
- 1.