Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 30-09-2009, 18:36   #16
Marine Service Provider

Join Date: Oct 2008
Location: Florida
Posts: 39
This is a very opinionated topic, one surveyor will say yes, they should be joined, another will say no. Most older boats will habe the DC and AC grounds bonded as somebody in the boats history will have joined them, on purpose or mistakenly.
All marine gensets should have the neutral and ground one and the same, therefore the Dc and AC grounds are joined. Another case of 'I like the CQR, you like the Delta' scenario
Kent
__________________

__________________
JustCatamarans is offline   Reply With Quote
Old 30-09-2009, 23:19   #17
Do… or do not
 
s/v Jedi's Avatar

Cruisers Forum Supporter

Join Date: Feb 2009
Location: in paradise
Boat: Sundeer 64
Posts: 9,198
Who said electrics were easy? ;-)

Normally, the AC neutral is grounded at the generating site, like a power station, a genset and even an inverter. You should never jumper AC ground to AC neutral at your bus bars or switch panel. This is why your Genset-Off-Shore transfer switch is important: it isolates the ground-to-neutral jumper in your genset from the system when on shore power.

The ABYC is a nice club, but what they write are recommendations and not requirements. It's also a US club and other nations have great minds too and sometimes decide on a different setup, like no connection between AC ground and DC negative. This argument will never end because there are good reasons for both approaches. I have my DC isolated from AC including AC ground, i.e. the EU approach.

cheers,
Nick.
__________________

__________________
s/v Jedi is offline   Reply With Quote
Old 01-10-2009, 09:25   #18
Nearly an old salt
 
goboatingnow's Avatar

Cruisers Forum Supporter

Join Date: Jun 2009
Posts: 13,649
Images: 3
I agree with s/v Jedi, with a resdual current interrupter ( aka GFCI) and then do not connect the AC ground/protective earth and DC negative. Far too many noise loops, resdiual current, impressed corrosions problems result. The interruptor takes care of the safety aspect.

Really The ABYC approach is overkill and ommits ( until recently) the advantages of whole boats RCD breakers. connecting AC earth and DC negative only really adds a small bit of extra protection anyway, The major metal objects in a boat tend to be connected to earth via seawater anyway and hence will trigger the RCD device anyway.
__________________

__________________
goboatingnow is offline   Reply With Quote
Reply

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Lexan Bonding George DuBose Construction, Maintenance & Refit 38 10-04-2011 18:19
Electrolysis Bonding Question Beausoleil Electrical: Batteries, Generators & Solar 35 07-01-2011 06:41
Bonding Starboard Sunspot Baby Construction, Maintenance & Refit 12 19-04-2009 04:41
No Bonding System tomrobalo1 Construction, Maintenance & Refit 19 10-07-2008 22:22
Seminar - Grounding vs Bonding GordMay The Library 3 23-07-2005 14:11



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 18:15.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.