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Old 07-27-2014, 11:35 AM   #1
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Electrical questions

Hey all, just a question about the battery fuse. I see some people have an in-line battery fuse located outside the trailer up by the battery. My trailer does not have one of those. I do have two 40A fuses in the converter which I'm thinking are for that purpose, but since I'm swapping to dual 6V do I need to do anything else with fuses?

I'm also thinking I might need to upgrade the + battery wire to the converter to 4 gauge. My current + wire leaves the battery and goes to this device mounted to the front of the A-frame that has 2 terminals on it, covered with a red rubber cap. I have no idea what this device is for. Any help?
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Old 07-27-2014, 02:47 PM   #2
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Pic of thing with red cap...?


It may be a fuse block
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Old 07-27-2014, 03:17 PM   #3
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What TT do you have?
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Old 07-27-2014, 10:11 PM   #4
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I have a 2014 Jay Flight Swift 198RD. I looked closer and it in fact does look like some sort of circuit protection device rated at 50A. The wiring from the battery to the converter is 6 gauge so I'm thinking that's not too bad for going to dual 6V batteries.
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Old 07-27-2014, 10:25 PM   #5
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Quote:
Originally Posted by SkyBound View Post
snip....The wiring from the battery to the converter is 6 gauge so I'm thinking that's not too bad for going to dual 6V batteries.
It's not just the gauge of the wire, but the length also. The 198RD isn't a long trailer so your existing 6 gauge wire length should work in your favor as compared to a 30ft TT.

Bob
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Old 07-27-2014, 10:47 PM   #6
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And the converter is only half way back the unit, so the stretch of wire is probably about 12' max.

Looks like I will have to replace that 50amp current limiter device with a larger one if I upgrade converters...
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Old 07-27-2014, 11:06 PM   #7
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.... Why are you considering upgrading the converter/charger?
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Old 07-28-2014, 11:43 AM   #8
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I just switched to dual 6V batteries and from the research I have done, my WFCO 8955 converter has some design flaws in it that will inhibit efficient charging of the batteries. It seems that the WFCO units, although "3-stage" don't actually go into the Bulk mode which is needed for quick charging. It also won't drop down into Float mode, which will cause the batteries to boil down over time.

I just ordered the Progressive Dynamics PD9260C which has the Charge Wizard and will give the battery exactly what it needs, when it needs it.
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Old 07-28-2014, 12:32 PM   #9
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Sounds like you have done your research, wire sizing looks good
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