BB_TX
McKinney, Texas
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Red man wrote:I am probably just gonna go with 2 awg maybe 3 and I need to know what size wire for neutral and size to use for ground was thinking 8 white and 10 green. gonna get 25 10 ft 1 inch pvc conduit 1 30 amp breaker and 30 amp 125 volt receptacle I had a electrician come out here I said I was gonna be doing the trenching and getting material he said 2100$ to hook it up/labor, figured I'd just do it myself I got a mini excavator to do the trenching, want to know that I am getting the right material and not missing anything.
The neutral carries the same current as the hot wire. The neutral wire must be sized the same as the hot wire.
I know the costs is high. But reading your statements, I am thinking you need to hire an electrician. Get several bids for what you want. Some are much higher than others.
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StirCrazy
Kamloops, BC, Canada
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Joined: 07/16/2003
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eHoefler wrote:JimR 1 wrote:eHoefler wrote:You need 1/0 aluminum for that distance you would get less than 3% voltage drop
Why Aluminum?
JimR
Copper would kill your budget! Copper is over 2x the money
I don't even look at aluminum wire, here the rules for using it are such a pain it isn't worth it. plus it has a higher maintence factor so if your fine with that you could save money but it isn't much cheaper up here.
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StirCrazy
Kamloops, BC, Canada
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Red man wrote:I am probably just gonna go with 2 awg maybe 3 and I need to know what size wire for neutral and size to use for ground was thinking 8 white and 10 green. gonna get 25 10 ft 1 inch pvc conduit 1 30 amp breaker and 30 amp 125 volt receptacle I had a electrician come out here I said I was gonna be doing the trenching and getting material he said 2100$ to hook it up/labor, figured I'd just do it myself I got a mini excavator to do the trenching, want to know that I am getting the right material and not missing anything.
wow, if you're doing all the work, it should be about an hour or two at most of labor and a permit fee. so I could see 200 to 300 bucks max if all he is doing is hooking in the two ends. now if he has to install a sub panel because yours is full and some stuff like that, then I could see the 2000.00
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2oldman
NM
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Red man wrote:want to know that I am getting the right material and not missing anything. I would think your local building department would have ready answers for you.
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wapiticountry
Mountain West
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1/0 Aluminum underground feeder would be my choice. Multiple times cheaper than copper in conduit. The trenching and installation is also easier. Only additional cost would be some sand to bed the wire if the ground is rocky.
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MrWizard
Traveling
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Remember the bigger the number the smaller the wire is
14ga 15amp breaker
12ga 20amp breaker
10ga 30amp breaker
These listing's are outlet and lighting
Not service figures
2ga carries more power than 4ga, 4 more than 6, 6 more than 8ga
For 30 amps 120v and 250ft I would not run anything smaller than 8ga , and would probably run 6ga if I expected to carry near 30amps full-time, Like electric heaters in the winter, it's not TV MW that are a problem it's turning on the coffee maker while running the A/C or electric heaters,
I can explain it to you.
But I Can Not understand it for you !
....
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BB_TX
McKinney, Texas
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It’s also about voltage drop. If you want no more than 3% voltage drop at full 30 amps for 250 feet (drop to 116.4 lots) you need at least 3 ga. That’s especially true if the normal line voltage is less than a full 120 volts to start with or routinely sags below 120 volts.
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Bobbo
Wherever I park
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A google search will tell you that you need 10g wire for a 30 amp outlet. It will tell you that you need 6g for a 50 amp outlet. Since you have such a long run, I would go 2 wire sizes larger, so for a 30 amp I would run 6g, for 50 amp I would run 2g. The NEUTRAL wire should be the same size as the hot wire(s). The GROUND wire can be 10g in all cases. I would recommend that whatever you do, you run the wires for a 50 amp outlet, that means TWO hot wires, one NEUTRAL, and one GROUND. Even if you only install a 30 amp outlet today, if you ever upgrade to a 50 amp rig, the wire is ready. All you would have to do is replace the outlet and the breaker. (Bigger wire is always better, but you have to do the cost/benefit analysis.)
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Mike134
Elgin, IL
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So asking an electrical question like the OP did on an RV forum.......
You'll get the same "expertise" if you ask the guys along the bar at your favorite saloon.
Safe travels
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wnjj
Cornelius, Oregon
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Mike134 wrote:So asking an electrical question like the OP did on an RV forum.......
You'll get the same "expertise" if you ask the guys along the bar at your favorite saloon.
Safe travels
Yep. Some of it will be purely opinion, some will be based upon actual experience involving their local codes/inspector and still others will be actual electricians who really know their stuff. In the case of my advice it’s the first two, with access to a brother-in-law for the third if needed.
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