3 Electrical system
3.1 Main switch
A main electrical isolator switch is standard on Terhi
Nordic 6020 C (with steering console) and Terhi 445
C and 475 models. On the 445 C and 475 the main
switch is located under the rear seat. The Terhi Nor-
dic 6020 C boat has its main switch on the steering
console.
The electrical system of Terhi boats is switched on
when the key is turned in a clockwise direction and
locked in position. The key is then in an upright posi-
tion.
When leaving your boat idle for a longer period, use
the main switch to cut the electric current. Also switch
o the current when carrying out electrical work.
If the main switch is retro-fitted, it should be placed
in an accessible location as close to the battery as is
practically possible.
Do not modify the boat’s electrical system or its
drawings. Modifications and servicing should be left to
a skilled professional in boat electrical systems.
WARNING! Never use the main switch to cut the cur-
rent when the engine is running.
3.2 Battery hook-up and placement
Battery placement on Terhi boats are as follows:
Terhi 400 and Terhi 445
- Under rear seat (in battery housing or fitted with
terminal protectors)
Terhi Nordic 6020 C
- In the steering console.
Terhi Nordic 6020 (without steering console):
- Under the rear seat in a space reserved for the bat-
tery
Terhi 475 BR/Twin C:
- In the co-driver’s console.
The battery must be mounted securely in the boat.
This is best achieved using a fastening strap, which is
fixed by screws or pop rivets to the base of the battery
space. If the battery is located in the same space as the
fuel tank, it must be fitted either with battery hous-
ing or terminal protectors. Ensure that no electrically
conductive items come into contact with the battery’s
positive terminal. The mountings of the cable lugs
must not be dependent on spring tension.
WARNING! Charge the battery only using the engine
or a battery charger. Charging at an excessive current
causes a risk of explosion.
3.3 Control panel
The Terhi Nordic 6020 C, Terhi 445 C and Terhi 475 are
all equipped with a control panel as standard (figures
2,3 and 4).
Figure 3. Nordic 6020 C control panel
Figure 4. Terhi 445 C and 475 Twin C control panel
Figure. 2. 475 BR control panel
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