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11-26-2012, 11:35 PM
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#1
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Rivet Master
1972 Argosy 20
Snoqualmie
, Washington
Join Date: Sep 2012
Posts: 503
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Another Univolt Question
My univolt has an integrated fuse block. I want to install a new Intellipower 45 amp converter, but I would also need to install a new fuse block. My question is would I be better off to install an Intellipower PD40450 AC/DC panel (or equivalent) vs a separate converter/fuse block? These things look like they are the modern "all in one" approach that my '72 Univolt was back in the day.
Thanks as always
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11-27-2012, 04:38 AM
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#2
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Rivet Master
1974 Argosy 28
Fresno/Clovis
, California
Join Date: May 2008
Posts: 704
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fuse box
here is what I used, from Best Converter. It has 10 fuses in it. I am using it with a PD9260.
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Roger
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11-27-2012, 05:03 AM
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#3
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Rivet Master
Airstream Dealer
Corona
, California
Join Date: Feb 2002
Posts: 16,497
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Quote:
Originally Posted by DryFly
My univolt has an integrated fuse block. I want to install a new Intellipower 45 amp converter, but I would also need to install a new fuse block. My question is would I be better off to install an Intellipower PD40450 AC/DC panel (or equivalent) vs a separate converter/fuse block? These things look like they are the modern "all in one" approach that my '72 Univolt was back in the day.
Thanks as always
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Most owners salvage the fuse panel from the original Univolt.
Andy
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11-27-2012, 05:50 AM
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#4
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Rivet Master
1973 23' Safari
1977 23' Safari
2018 25' Flying Cloud
Palmer Lake
, Colorado
Join Date: Oct 2005
Posts: 4,092
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A lot of us previously remove dthe fuse block from the old Univolt and used it. The advantages are (1) cheap, (2) retain the clips for higher amperage (>50 amps) glass fuses, and (3) you retain the original current shunt (the small copper plate used to sense battery current).
Disadvantages are (1) need for mechanical mounting and (2) continued use of the old glass fuses.
I recommend getting the Intellipower without a fuse block and buying a separate item. You can find really good DC fuse blocks for $17-$35 that use the new automotive fuses up to 40 amps. You can make your own current shunt using a 2-terminal electrical terminal strip and about 11" of #10 stranded copper wire.
Zep
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11-27-2012, 08:31 AM
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#5
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Rivet Master
1972 Argosy 20
Snoqualmie
, Washington
Join Date: Sep 2012
Posts: 503
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Thank you all. I'll take the Univolt out and check out salvaging the fuse block as noted. One good thing that should come out of this is that I get to learn what a shunt is. I'll carefully make notes of the current setup and should be able to transfer that information to successfully put together a new converter with old fuse block and shunt. I mean, what could go wrong?
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11-27-2012, 09:18 AM
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#6
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Rivet Master
1973 23' Safari
1977 23' Safari
2018 25' Flying Cloud
Palmer Lake
, Colorado
Join Date: Oct 2005
Posts: 4,092
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You can see how I used a $17, 8-position fuse block in my Overlander here.
This is a shunt. It is important that it is in the ground (-) wire from the battery(ies). You can measure total current into or out of the batteries with the wiring configuration shown in the post. At 50 amps the shunt has only 50 millivolts across it, so there's negligible loss of voltage with it in the circuit. The problem with the old Airstream control panels was that the mechanical voltmeter was calibrated to 100 amps, plus and minus, so you couldn't see much movement when you were drawing less than 5 amps. Most of the time you're boon docking you're interested in small continuous current draw, eg, the radio at 0.5 amps. You just can't read that with the old voltmeter. Use a new digital voltmeter and you can read out 0.01 amps through the shunt.
Zep
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11-27-2012, 11:02 AM
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#7
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Rivet Master
1968 24' Tradewind
Oxford,
, Mississippi
Join Date: May 2009
Posts: 1,564
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Randy at Best Converters can give you advise on the best product for your trailer. He stocks anything you will need.
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Bruce & Rachel
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68 Trade Wind
2001 Toyota Tundra
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11-27-2012, 06:46 PM
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#8
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Rivet Master
1972 Argosy 20
Snoqualmie
, Washington
Join Date: Sep 2012
Posts: 503
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I own and work on old buildings and have learned a lot over the years about mechanical and electrical systems (and structural systems, and even more about water infiltration and all the problems that thing involves), at least when to recognize an issue and when and how to hire a good contractor to repair or replace that which is necessary. This is a new planet, and I am soooo humbled.
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