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Old 09-30-2014, 10:21 AM   #1
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Power Jack Wire: Where Does it Terminate?

I've got a 2008 Classic 25fb with hydraulic disc brakes.
I traced the power wire from my Barker jack and it comes off the wire bundle that is also has wires connected to the trailer brake safety switch on the A frame. The wires are wrapped and I can feel a bulge as the loom curves under the A frame, so that must be the fuse for the power jack (Barker Superjack). The wires then enter a hole in the frame. I guess the two wires for the brake safety switch must go to the hydraulic brake actuator but where does the power wire terminate to, somewhere in the interior of the trailer, maybe under the front bed where the converter is located?

That brings up another question. Is the power wire for the LP detector wired into the same place? I'd like to move it downstream of the Use/Store switch so its deactivated when the in the Store mode.

Kelvin
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Old 09-30-2014, 09:18 PM   #2
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in my unit both of those wires are there near the converter. the lp detector has an inline glass fuse.
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Old 09-30-2014, 09:24 PM   #3
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Not that we should expect any consistency, but my LP detector wire is orange with an inline fuse holder. I moved mine like you suggest.
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Old 11-19-2014, 08:02 PM   #4
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Got a similar question except my 72 AS had no wiring for the Tongue Jack. The Jack itself was so locked up I bought an 18" LCI Jack. But I have no wiring schematics to go by to hook up power. Anyone have suggestion what kind of lead I need from Jack and where does it get its Power? Thanks in advance!
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Old 11-19-2014, 08:32 PM   #5
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Mine has a power lead with an inline fuse that goes directly to a ring terminal on the battery positive post. My battery box is on the A frame. I assume it is grounded to the A frame. Works for me.


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Old 11-19-2014, 08:45 PM   #6
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The Barker Superjack power jack on my 2005 is wired directly to the batteries located on the A-frame with 12ga wire and a 30A inline slow blow fuse. It's grounded to the frame.
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Old 11-19-2014, 09:20 PM   #7
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Quote:
Originally Posted by CA Streamer View Post
The Barker Superjack power jack on my 2005 is wired directly to the batteries located on the A-frame with 12ga wire and a 30A inline slow blow fuse. It's grounded to the frame.
It's actually a 10AWG wire, hence the 30 amp fuse.
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Old 11-19-2014, 09:46 PM   #8
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Quote:
Originally Posted by lewster View Post
It's actually a 10AWG wire, hence the 30 amp fuse.
That could be Lew. The manual specs it as a 12G wire though...unless the manual is wrong. It is an older H&H so maybe they increased the wire size on the newer jacks.
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Old 11-19-2014, 09:51 PM   #9
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Quote:
Originally Posted by CA Streamer View Post
That could be Lew. The manual specs it as a 12G wire though...unless the manual is wrong.
According to NEC code, any 12 AWG wire should be protected with a 20 amp circuit protection device and any 10 AWG wire should use a 30 amp device, as these numbers represent the rated ampacity of the wires in question. If you DO have a 12AWG wire with a 30 amp fuse , it id not to coed and the fuse should be replaced with a 20 amp version.

Having re-wired many jack positive leads when changing battery banks or adding solar, all of the wires have been 10AWG. I would physically check yours to be sure.

Manuals have been known for their errors and omissions on many occasions.
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Old 11-19-2014, 11:20 PM   #10
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Thanks for the info, Lew. I'll check it out. It was installed at the factory so hopefully they got it right and used a 10g wire. You got my curiosity up so I checked the current Barker manuals on their website and they still call for a 12g wire. Maybe I need to contact them and let them know about the NEC code and their error. I wonder how many self-installed jacks are out there with mismatched wire/fuse.
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Old 11-20-2014, 07:09 AM   #11
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Interesting that they would publish installation instructions that clearly state using a fuse that is too large for the wire ampacity. I would love to know their reasoning for this........

Thanks for including their install page.
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