Is this 12-VDC house system layout idea correct?

[luvrbus]

Like Ted I always saw the cut off on the ground on equipment never on the positive side that could be why the shut off is never a problem on equipment

[Oonrahnjay]

(Snip) the BlueSeas terminal fuse is good to 58 Volts. At 32 volts it has a 5000 amp circuit interupt.   

    Anybody know how may amp you'd see if you had a direct short between the poles of a given battery, say a 235 amp/hr 8-D?  How about a pair in series to give 24V?

[Brassman]

I believe Sean talked about this a few weeks ago.

But from this link: http://ecmweb.com/mag/electric_battery_sizing_basics/ , it states that an 800 amp-hour battery can deliver up to 9000 amps in short circuit.

My bank is currently 480 amp-hours at 12V, so I have no problem with BlueSea's terminal fuse. Of course, a catastrophe fuse could do the higher current interupts.

[Oonrahnjay]

    Thanks, that's good to know.  I'm def going to put insulating caps and other insulation on my house battery bank connections and jumpers.

[TedsBUSted]

Like Ted I always saw the cut off on the ground on equipment never on the positive side that could be why the shut off is never a problem on equipment

Oops,
For brevity I took the heavy equipment reference out of my post, possibly as luvrbus was responding to it.

But to cover it, when opened, the master disconnect switches also separately break the charging system, to prevent the system frying scenario I described in post #13, should the  master switch inadvertently be opened while the engine's running.

My concise  point was that a heavy short that would cause the opening of a catastrophic-fuse installed at a battery's chassis side, while the battery's power side still has some other feed, will simply push the heavy shorting further up the system, through the feed. Of course a lighter gauge feed won't have the ampacity to "just take it" the way that non-fused heavy battery cables typically can.

But getting back to Mex-Busnut's wiring, so far his description and DC-Layout drawing lack the details of proposed connections at Regulator Tee, Isolator, and Engine Battery Bank, that would be detailed enough for anyone to answer his switching question, just yet.

Ted