Attach The Power Cables - Raymarine 150 Installation Manual

Step 3: Install the Course Computer

3.4 Attach the power cables

WARNING: Electrical safety
Make sure the power supply is switched off before you make any
electrical connections.
Follow these steps to provide power to the course computer:
1. Measure the total length of cable run from the boat's distribution
Note: When selecting power cable you must use the gauge specified
in Table 3-1. If in doubt, use a heavier gauge cable than specified.
A lighter gauge cable might cause a voltage drop between the supply
and the course computer. This could cause the course computer to
malfunction and will reduce the power supplied to the drive unit.
2. Route the cables back to the course computer, taking into account
3. Install a circuit breaker or fuse on the power supply to suit the
4. Connect the cables to the POWER inputs on the course computer.
5. Attach the suppression ferrite (supplied) around both the positive
Course computer – connecting power supply
panel to the course computer, then use Table 3-1 to identify the
appropriate cable size.
the EMC installation guidelines (page 7).
drive unit connected to your autopilot system (see Table 3-2).
and negative power cables, between the cable clamp and course
computer. When you attach the ferrite, you must loop both power
cables so that the ferrite encloses two passes of each cable.
Secure the ferrite with the small tie-wrap (supplied).
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