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Old 09-08-2013, 04:04 PM   #21
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That's why THE FRAME IS USED AS NEGATIVE PORTION OF BATTERY ELECTRICAL CIRCUITRY.... Just my thought...
As I have learned from many years of working on and rewiring FGRV's, frame ground is just a cheap way to provide a poor ground. I have lost count of the number of electrical problems were traced to the frame ground connections.

I always run both a hot and a ground lead to everything I wire, and have a common ground buss near the battery and/or the negative side of the converter. But I guess I will just have to live with all that extra weight.



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Old 09-08-2013, 04:28 PM   #22
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Originally Posted by Thinh View Post
That's why THE FRAME IS USED AS NEGATIVE PORTION OF BATTERY ELECTRICAL CIRCUITRY...
Quote:
Originally Posted by Bob Miller View Post
As I have learned from many years of working on and rewiring FGRV's, frame ground is just a cheap way to provide a poor ground. I have lost count of the number of electrical problems were traced to the frame ground connections.

I always run both a hot and a ground lead to everything I wire, and have a common ground buss near the battery and/or the negative side of the converter. But I guess I will just have to live with all that extra weight.
Now I get to completely agree with Bob!
Wire for the negative side isn't pointless extra material, because it is performing a useful function. In a non-metal structure (such as our eggs, but even stick-built RV bodies), a significant length of wire is needed for the negative side anyway (to reach the frame from the light or appliance) so going through the frame just reduces the wire length somewhat at the expense of adding problems.
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Old 09-09-2013, 05:54 PM   #23
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First, I'd suggest installing a 12v fuse panel with separate fuses and wire to your furnace, water pump, refrigerator (if 12v), inverter (if you build one in . . . I did, a 150w unit with a shore power/inverter crossover switch, and love it), 12v sockets, and lights. It makes trouble shooting easier on down the road.

As for wire gauge, I'd go with 10g or even 8g from your battery to the fuse panel, same gauge as the mains for your inverter, then 12g to everything else.
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Old 09-09-2013, 06:28 PM   #24
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...When one using frame as actually negative branch of battery circuitry, he/she should treat it as an actual conductor, not a dumping ground for complicated negative wirings, then everything would be OK, in my opinion...Thinking and talking is also different. Practice and reality is another story. I am not an electrical expert as said thousands of times but in reality I did all my wirings, including frame as negative branch with no problem, whatsoever so far. Now, let's take a look about my practice:....
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