[PSUBS-MAILIST] grounding question

Mon Dec 9 12:21:46 EST 2013

Order a copy of "The 12-volt Bible for Boats" off Amazon or maybe from your nearest marine supply shop. It's got a really good section on fundamentals which can be easily extrapolated to 24 or 36 volt or whatever. There are many books out there, but that one is designed for idiots like me. Plain, clear language, and makes no assumptions. Perfect. I recommend it.
Vance

-----Original Message-----
From: swaters <swaters at waters-ks.com>
To: Personal Submersibles General Discussion <personal_submersibles at psubs.org>
Sent: Mon, Dec 9, 2013 11:35 am
Subject: Re: [PSUBS-MAILIST] grounding question

oh crap. I better look into this more then. I am currently working on the sub trailer and adding a compass and trying to figure out the stupid battery gauge problems I am having over the winter. Electrical is my weakest point of building a sub. I had a guy helping me, but he lost interest when we got mostly complete. Now I am stuck trying to figure out the rest. 
Thanks,
Scott Waters 

-------- Original Message --------
Subject: Re: [PSUBS-MAILIST] grounding question
From: "Smyth, Alec" <Alec.Smyth at covisint.com>
Date: Mon, December 09, 2013 9:02 am
To: Personal Submersibles General Discussion
<personal_submersibles at psubs.org>

It can be alarmingly fast. The bit that will corrode is where the electrons are leaving the hull. That probably won’t be through the paint, but surely you have parts made of aluminum or stainless somewhere that are unpainted yet electrically connected to the rest of the boat. I seem to recall Vance telling a story of an electrical mishap leading to his sub dissolving around him in a cloud of bubbles like a giant Alka Seltzer tablet, leading him to surface as fast as he could. Can’t recall the particulars… Vance? 

From: Personal_Submersibles [mailto:personal_submersibles-bounces at psubs.org] On Behalf Of swaters
Sent: Monday, December 09, 2013 9:09 AM
To: Personal Submersibles General Discussion
Subject: Re: [PSUBS-MAILIST] grounding question

I might have to rethink that then. I currently have six tru hulls (3 in each pod). One vent/chargeing plug, one 12V and one 36V. There is no place to run a negative with my current set up with the exception of not using tru hulls and just running wires, but there would be no battery pod breach protection. Just curious, I know that electricity promotes corrosion in salt water, but how would the metal corrod under the paint especially when it is in water for a limited amount of time?

Thanks,

Scott Waters

Sent from my U.S. Cellular© Smartphone

"Smyth, Alec" <Alec.Smyth at covisint.com> wrote:

Hi Scott,

If I understand you correctly, it sounds like you might have wired her as you would a car, with cables for the positive and using the chassis for the negative. This is a steel boat, so instead of that, what one does is two cables, one for positive and one for negative, but both of them equally isolated from the hull. Else, you are inviting a case of accelerated corrosion. 

Best,

Alec 

From: Personal_Submersibles [mailto:personal_submersibles-bounces at psubs.org] On Behalf Of swaters
Sent: Monday, December 09, 2013 12:57 AM
To: Personal Submersibles General Discussion
Subject: Re: [PSUBS-MAILIST] grounding question

I connected mine to the electrical pannel through the body of the sub

Thanks,

Scott Waters

brian <brian at ojaivalleybeefarm.com> wrote:
Hi All,
              On the K boats where does one normally connect the ground to the sub?  

Brian

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