Alternative grounding for fibre glass hulls
98-137654-A Appendix B: Grounding and RF protection B-9
BBBB
Grounding and RF
B.5 Alternative grounding for fibre
glass hulls
B.5.1 Grounding the ACU
The ACU should preferably be grounded with the short ADU
cable and a grounding kit (available from Thrane & Thrane).
Further, the ACU must be grounded at its grounding stud in
order to ensure a proper grounding if the short ADU cable is
disconnected.
The ground connection must be established at a dedicated RF
ground (either capacitive or electrical coupled).
B.5.2 Grounding the ADU
If the mounting base of the ADU is electrically connected to
any other ground potential than the ACU (e.g. Lightning
Ground), the ADU must be isolated at its mounting bolts by
means of shoulder bushings and washers - see section B.6.3.
However, a ground connection must be established via one of
the mounting bolts using a separate ground cable. The
ground cable must be routed parallel and in close proximity
to the shielded coax cable hence connecting the ADU to the
ACU Grounding kit. A heavy gauge wire with tinned strands
(min. 6 mm
2
) can be used for this purpose.
Importan
Bear in mind that the ADU ground connection is to
be made at the same electrical ground potential as
the ACU (see Grounding the ADU).
SAILOR100TM.book Page 9 Tuesday, January 29, 2013 2:44 PM
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