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Old 04-06-2021, 11:01 AM   #1
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Adding a 12V outlet

I would like to add a new 12V outlet to my Casita using one of the empty slots on the DC distribution panel. My question is, where does the negative / return wire from the outlet go? It appears the positive goes into the distribution panel, but I am confused where the negative goes. I am (obviously) very green at how electrical works, so appreciate your help!
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Old 04-06-2021, 11:28 AM   #2
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Look for a negative buss bar. Or just attach it to the frame.
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Old 04-06-2021, 02:12 PM   #3
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Good time for a USB also

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Originally Posted by qkracken View Post
I would like to add a new 12V outlet to my Casita
https://www.amazon.com/s?k=12+volt+a...f=nb_sb_noss_1
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Old 04-07-2021, 11:20 AM   #4
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Does your power distribution panel have multiple negative terminals? If so this is where you would connect. If not, you would need to wire in a splitter or bus bar. Note you have to stay within the power limits of your panel terminals so be careful with high powered items like electric water pots and electric blankets. If you intend to power an small Led light or phone you will be fine. Most likely your panel is rated to handle high wattage incandescent lamps. I added multiple usb outlets and 12 volt sockets inside my trailer. That said you must do your due diligence to make sure your not overloading your panel or wires.
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Old 04-07-2021, 12:47 PM   #5
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The Casita A to Z Owner's Guide book has a wiring diagram that would help you first to understand what's already there, and secondly how you might best integrate new devices.

Casita Travel Trailers A-Z Owner's Guide
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Old 04-07-2021, 03:09 PM   #6
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Hey Mike. Getting a little touchy in your middle age?
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Old 04-07-2021, 03:32 PM   #7
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Thanks all! I do have the Casita A-Z book and have studied the wiring diagram.

I guess maybe the negative load for each device is just tied into the negative wire that runs around the entire Casita as opposed to individual negative terminals on the distribution panel. In which case, would the solution be to wire in a new negative bus bar to connect new devices to?
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Old 04-07-2021, 04:43 PM   #8
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Hey Mike. Getting a little touchy in your middle age?
I think people should be able to post pretty much whatever they deem appropriate here.

Unfortunately, they often do.

Just sayin'.
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Old 04-07-2021, 04:53 PM   #9
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Quote:
Originally Posted by qkracken View Post
Thanks all! I do have the Casita A-Z book and have studied the wiring diagram.

I guess maybe the negative load for each device is just tied into the negative wire that runs around the entire Casita as opposed to individual negative terminals on the distribution panel. In which case, would the solution be to wire in a new negative bus bar to connect new devices to?
You might run the risk of overloading a shared conductor if you just add another device to it. You'd have to look at the loads and see what the numbers tell you.

It seems this is a bit of a tough call to make without seeing what's going on. Is the bus full? Can a couple of conductors be doubled under one of the screws? Would splitting one or more of the existing wires with a different junction style located adjacent to the bus be acceptable? Do you have a place to add a bus? How many new devices are you thinking of?

Whatever you do, you'll want to have solid, reliable, vibration-resistant connections.
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