Separate ground cable
98-148248-C Appendix C: Ground and RF protection C-9
CCCC
C.6 Separate ground cable
C.6.1 To make a ground cable
When dealing with electrical installations in a marine environment, all wiring must be done
with double insulated, tinned strands, high quality and if exposed also UV resistant cables.
This shall also apply to the separate ground cable mentioned in the previous paragraphs.
The ground cable is made using an appropriate cable with a cross section area of at least
6mm
2
(AWG10) and terminated with insulated ring crimp terminals, see the illustration
below. The crimp terminals must be a marine approved type e.g. the DuraSeal series from
Raychem.
C.6.2 Ground cable - connection
To mount the ground cable do as follows:
1. Mount the ground cable close to and parallel to the shielded coax cable thus minimizing
ground loop problems. If possible, route the coax cable and the ground cable in metal
conduits bonded to the hull or within a mast (depending on the actual installation).
2. Connect the ground cable at one of the mounting/grounding bolts on the ADU.
3. Use bolts and washers of stainless steel and seal the joint with protective coating to
avoid corrosion.
4. If the ADU is to be isolated from the mounting base, use shoulder bushings and washer,
see figure C-7, Isolation of the ADU from the mounting base on page C-10.
5. At the other end, connect the ground cable as described in To ground the ACU on
page C-1.
Figure C-6: Separate ground cable
Antenna:
M10 Insulated Ring
Terminal (Raychem,
DuraSeal Series )
Terminal:
Appropriate size
Insulated Ring Terminal
(Raychem, DuraSeal Series )
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