What size breaker(s)?

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What size breaker(s)?

Postby chesterlion » Sat Jul 05, 2008 12:22 pm

I am running a 50ft. 12-2 cord from the camp pole to the 70 amp breaker box. I couldn't find a 30 amp. box. Ac wiring inside the trailor will be 12-2. Although it is a 2 space breaker box I think I'm only going to run one circuit at this time. The circuit includes one GFCI plug chained to a regular plug so they will both be GFCI protected. What size breaker should I use?
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Postby BPFox » Sat Jul 05, 2008 3:12 pm

If you have to buy one, I'd buy a 20 amp. If you happened to have, say, a 15 amp breaker laying around, feel free to use that. If down the road you should decide to add a second circuit, it too can either be a 15 or 20 amp circuit provide you use 12 ga wires for it as well. If you do add another circuit, however, you will want to reconsider the size of your extension cord. A 10 guage extension cord would be a better option if you choose to add more electrical goodies. Peace.
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breakers

Postby chesterlion » Sat Jul 05, 2008 5:05 pm

Madjack & Miriam weigh in.
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Postby Mark Freedom » Sat Jul 05, 2008 5:56 pm

Nobody can say because you don't specify your amp draw, but 12-2 running to a 70 amp service is asking for trouble somewhere down the line for sure.
If right now you are only running a tv or so, then it will work out for now, but if you start sticking an AC, microwave, coffee maker, fridge, etc. in there, then you're going to have a melt down.

Everything is centered around amp draw, that determines breaker size and the wire used to feed the trailer and the wire inside the trailer.
If you run 12 awg to a tv it's over kill, but to an AC then it's about right.
lighting is 14 gauge, appliances are generally 12 gauge.
Most TT's run about 20 feet of #8 to feed a 60 amp service.
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Postby madjack » Sat Jul 05, 2008 11:15 pm

CL, 12ga wire is good for 20A...the size of the outlet box or the breaker box is inmaterial...it is the amount of actual amp draw that is the critical determining factor...for our 120vac needs we run 2 15A circuits out of the breaker box...oh yeah, we don't use a breaker box...we buy push button, panel mount circuit breakers from www.waytekwire.com ...these little circuit breakers are about the size of a matchbox and cost under 3 bucks apiece...we run an inline fuse to the panel with a 20A fuse init, to protect all the 120vac WIRE......
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Postby Reddiver » Sun Jul 06, 2008 10:10 am

Mad jack thanks I new somebody made a compact circuit breaker . I just sent for the catalog
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Postby madjack » Sun Jul 06, 2008 1:35 pm

Reddiver wrote:Mad jack thanks I new somebody made a compact circuit breaker . I just sent for the catalog



keep in mind that these are a panel mount unit and you will havvta make up your own panel/box....we use a scrap piece of formica for this...in the pic below, you can see them in the center portion as 2 "buttons"...
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Postby mechmagcn » Sun Jul 06, 2008 1:56 pm

While I know that 30A is way overkill for a TD, this converter/charger is what I plan to use. It combines AC/DC distribution and a charger into one unit.
http://www.bestconverter.com/6730-30-Amp-Power-Center_p_90-135.html[/url]
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Postby BPFox » Sun Jul 06, 2008 4:49 pm

Actually 30 amps is not overkill for any size trailer if you plan to equip it with extra electric goodies. For example, I plan to install an electric heater as well as an air conditioner. I will be using a two breaker 30 amp box for this. I like the looks of the panel style breakers shown here, but I am kind of cheap and I already have the panel box. It's the old one from my garage when I only had lights and plugs. I upgraded the electric in the garage when I put in my welder so I have the two breaker box just sitting there waiting for a home. There was another poster a while back who had a two burner electric stove that pretty much needed one circuit by itself. A 30 amp service would be needed in that application as well. While the original poster talks about a 70 amp box, he also said that he will only be running a single circuit with a couple of receptacles so at this point the two breaker box is overkill, but he does have room for expansion. Regardless, if you like the electric goodies, you can use up 30 amps in a hurry. To each his own....Peace.
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Re: What size breaker(s)?

Postby Miriam C. » Sun Jul 06, 2008 5:23 pm

chesterlion wrote:I am running a 50ft. 12-2 cord from the camp pole to the 70 amp breaker box. I couldn't find a 30 amp. box. Ac wiring inside the trailor will be 12-2. Although it is a 2 space breaker box I think I'm only going to run one circuit at this time. The circuit includes one GFCI plug chained to a regular plug so they will both be GFCI protected. What size breaker should I use?


:thinking: Did you want the cord to be Grounded ???????????? You need a 12/3 so you can ground the teardrop and everything inside. Your panel will have a hot, neutral and ground. 3 wires and needs a corresponding cord.

I am assuming you are not running a hotplate and hair dryer all day and night. :thumbsup:
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Postby Reddiver » Sun Jul 06, 2008 5:30 pm

Damn this is a camping trailer . I am not going to live in it or spend anymore time in it than I have to I prefer the outdoors
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Postby Dale M. » Sun Jul 06, 2008 5:56 pm

But we assume you don't want to be electrocuted so you can enjoy great outdoors....

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Postby Reddiver » Sun Jul 06, 2008 8:04 pm

I am fine wih safety . I wonder if one really needs electric frige electric oven micro wave AC electric heaters TV s Dvd players, blenders , and particularly generators . I would suggest staying home.
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Circuit Breakers

Postby chesterlion » Sun Jul 06, 2008 8:28 pm

Yes Auntie M the supply cord going into the TD had three wires and the 12-2 with a ground was wired into the box as the out going. I used the pictures in a previous post of yours to wire the box in and out. They helped out a lot. My wiring job looks just like your pictures; except I didn't use the jumper since I'm only using one side of the box. Thank You. You guys are great.
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Postby Miriam C. » Sun Jul 06, 2008 8:28 pm

Reddiver wrote:I am fine wih safety . I wonder if one really needs electric frige electric oven micro wave AC electric heaters TV s Dvd players, blenders , and particularly generators . I would suggest staying home.


:lol: NOT! I can do without most of that but for those of us who don't live in CA the heater and air conditioners extend the season and make sleeping so much easier.

Then there are the few who have breathing machines and other medical equipment. Isn't it nice to be able to have most of it. :twisted:
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