[Public-List] Truecharge 40 (TC40) multi step charger - DC CaseGround question

[John Birch]

Hi Don, thanks for the input.

However I am asking about the case ground which is a DC case ground, it is a 
bolt attached at the bottom of the case to the right, beside the three 
Positive DC points (opposite the DC Negative which is to the left of the 
Positive leads)


----- Original Message ----- 
From: "Don Lang" <potatosailor at yahoo.com>
To: <public-list at lists.alberg30.org>
Sent: Thursday, June 18, 2009 2:07 PM
Subject: Re: [Public-List] Public-List Digest, Vol 1545, Issue 1


> John,
>
> On the true charger's the A/C wires come out of the top of the unit and 
> the D/C wires come out of the bottom. The Case is ground via the Green A/C 
> wire coming out of the top of the unit which you connect to the A/C ground 
> in your vessel. (if you remove the case cover you will see the green wire 
> is soldered to a foil that is connected to the case and the board).
> If you are referring to the negative D/C wire that comes out of the bottom 
> of the unit next to the three positive D/C wires; that gets connected to 
> the vessels D/C battery ground, either a common ground (often found on the 
> engine), or Negative bus bar, or directly to the battery ground. An 
> important note: if you are charging more than one battery bank you must 
> ensure that all the banks battery grounds are connected and that none are 
> isolated.
> PS if you find the charger quits working down the road check the fuses 
> inside the case before tossing it; there are six 30 amp ATC fuses near the 
> bottom and one 15 slow blow fuse near the top, the slow blow is easy to 
> miss and is the one we find goes out the most.
>
> Cheers, Don
>
>
> Message: 7

----- Original Message ----- 
From: "John Birch" <Sunstone at cogeco.ca>
To: "Alberg 30 Public List -- open to all" <public-list at lists.alberg30.org>
Sent: Thursday, June 18, 2009 1:09 PM
Subject: [Public-List] Truecharge 40 (TC40) multi step charger - DC 
CaseGround question


> I've installed a Truecharge 40 (TC40) multi step charger on Sunstone 
> (A37). I have one question, the DC Case Ground for the TC40, where should 
> I ground it to?
>
> I am assuming one would not connect the DC Case Ground to the AC ground. 
> So where do I connect it ?:
>
> * To a bronze through hull ?
>
> * To the engine (the prop shaft and prop are not isolated from the water 
> or engine) ?
>
> * To the negative post on the battery ?
>
> * To the negative Bus Bar ( the same really as connecting to the negative 
> post ?
>
> I don't have my through hulls connected to a bonding system or a galvanic 
> isolator.
>
> I do have a prop nut zinc, which does deteriorate, but not rapidly.
>
> I do not want to end up having AC current stray currents leaking into the 
> water at our marina. Nor do I want to create corrosion issues on my 
> Through hulls or prop or rudder post. Our marina has an updated AC 
> electrical system.
>
> I am also installing a ground fault circuit interrupter (GFCI), on the AC 
> outlet.
>
> Does this change where I would run the DC Case Ground on the TC40 ?
>
> All the wiring is well secured and the TC40 DC+'s are all 50AMP Fused as 
> per the manual. But the manual is not clear on the case ground.
>
> Any knowledgeable input would be appreciated.
>
> Many thanks,
>
> John Birch
> Hamilton, Ontario
> Canada
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