Join Date: Oct 2006
Location: on the boat - Chesapeake
Thanked 158 Times in 141 Posts
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Re: Another RF ground ??
The issue here is different from the RF ground appropriate for an SSB. The cables that interconnect your electronics are shielded to minimize the potential for radio frequency interference (RFI). RFI may cause data disruption. Autopilots are particularly prone to unfortunate responses to RFI. Stories of 90 degree turns when a radio is keyed abound.
In your case connecting the shield to the battery negative will be most effective. Unless you are confident that you can avoid ground loops you are best served using the negative bus bar for the shield connections.
In the long term you should understand ground loops (bad) and single point grounds (good). Realize that there are a number of ground systems on your boat: DC ground (battery negative), AC safety ground (the green wire), AC neutral (the white wire which may will have a connection to the safety ground at inverters or generators), RF ground, a lightening ground (apparently on your boat but not on all), and possibly a galvanic bonding system. There are relationships between the various grounds and the interconnections should be in association with a single point ground.
sail fast and eat well, dave
beware "cut and paste" sailors.
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