Installation of the ADU
3-22 Chapter 3: Installation 99-145912-A
3.3.3 To ground the ADU
The ADU must be grounded using the mounting bolts.
To ground the ADU do as follows:
1. Clean the metal underneath the head of at least one bolt of
insulating protective coating and use a serrated washer to obtain a
good ground connection
2. Tighten the bolts. Use stainless steel bolts and washers.
3. Seal the area suitably to avoid corrosion of the grounding point
(recommended).
For optimum grounding connect the ground wire to the bolt marked
in the figure below.
If the ADU cannot or should not be electrically connected directly to
the mounting surface, you can use a separate grounding cable to make
the connection between the ADU and the common ground to which
the ACU is also connected. If grounding to the ship ground is
impossible, for example if you have a fibre glass hull, see Alternative
ground for fibre glass hulls on page B-9.
For further information on grounding and RF protection see the
appendix Ground and RF protection on page B-1.
Figure 3-21: ADU, bolt for optimum grounding
Bolt for optimum
grounding
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