The hum is audible while using any AC source, shore power or the ships inverter. Only the green ground wire is connected to the battery negative.
I believe the risk of electrocution is small. My AC system consists of 8 outlets and a battery charger. While I do not rely on them for protection, I have GFI protection on all my AC outlets I have decided to install a switch in the ground to battery negative wire and only close it when using the computer as the audio source to the sound system. This is the only time I get a hum and I only use this set-up when watching a movie. Thanks for the input. Philip On Wed, 2009-12-09 at 13:04 -0800, Lew Hodgett wrote: > The only "Clean" way to do this job is to install an isolation x'fmr > on > the AC shore power. > > This will isolate the shore power ground from the AC boat ground > while > still providing an AC boat ground and safely resolving the problem. -- Philip Lange AE4OV USSV ORYOKI 233 Core Creek Road Beaufort North Carolina 28516 'There's no point in having a plan if you're not going to pretend to follow it.' _______________________________________________ Liveaboard mailing list [email protected] To adjust your membership settings over the web http://www.liveaboardnow.org/mailman/listinfo/liveaboard To subscribe send an email to [email protected] To unsubscribe send an email to [email protected] The archives are at http://www.liveaboardnow.org/pipermail/liveaboard/ To search the archives http://www.mail-archive.com/[email protected] The Mailman Users Guide can be found here http://www.gnu.org/software/mailman/mailman-member/index.html
