Overhead or Buried

[heitjer]

All,
I have been reading up on some post here and I am trying to figure out some basic costs before I start speaking with the local Energy Company.

I purchased a 6.3 acre lot and I have already two power poles & meters on the lot (two mobile homes in the past). Here is a sketchup shot of the front lot. You can see the two meters. #1 is in the middle of nowhere and I like to remove it. Number #2 is close where we like to have our future house.

The red line (~275 ft) indicates a power line that I can envision running on telephone posts that also can use to illuminate (separate electrical line) the riding arena behind the house. The green dottet line (~195 ft) indicates a possible buried power line. The blue-turquoise line (~75 ft) indicates a buried line from the existing pole barn to the future horse barn.

I figured I need 100A at the pole barn and about a 20A at the horse barn (max).

I would like to hear some recommendations from you whether I should go buried or overhead (i prefer buried but I am afraid this cost 3 times more...).

I meet with the power company rep sometime in the next two weeks and will get his opinion but like to come prepared with good questions. So please throw your wisdom at me.

Thanks in advance!

 

[rambler]

Your red line would follow the green line as well - it would not make the zig-zag for only 300 feet. They wouldn't put in that many posts. Think straight lines. They won't go for the zigzag.

Ask if they would move the current meter to the barn location - it could possibly be cheaper to keep the 2 meters rather than eliminate one & run your own wire. Utilities can have odd policies like that - doesn't hurt to ask. You'd be charged 2 minimum bills, but would have very little wire expense & have good power available!

I myself prefer underground. We had overhead here at the farm which was placed in service in the 1950s - 60 amp main service. I replaced it a few years ago with underground, 200 amp service, with 60 amp available at all 11 buildings. Yes it was expensive. My coop REA utility was very friendly at doing their part up to the new transformer wherever I wanted it, 50 cents a foot for undergound; overhead woulda been free. Any wire after the transformer was of course on me.

I would expect you want a 200 amp service, with 200 amp run to the pole barn (anyhow 150amp), and at least 60 amp run to the future barn. It costs money to do whatever you do, the cost of upgrading the wire to a 60 amp to the far end is pretty cheap now; costs a great deal to redo it over a second time in a few years. Twenty amps won't run lights, water warmer, and a bale elevator at the same time. 20 amps isn't enough. Try to run an air compressor & a set of lights at the same time on 20 amps - it don't work. Why have issues just trying to inflate a tire on your wagon????? Seems worthless - if you bother to run the juice, run 60 amps and then you & future owners will have something.

Maybe you will end up putting in another building to the right of the future horse barn, and will then be able to branch off 30 amps to that. If you only wire in 20 amps, you are done, and have to start over....

I can't see the lay of the land, future expansion might not work the way I say, but the principle is there. Do it right the first time - plan for 60 amp anyhow to the fartherest building. It costs less than having to redo it a 2nd time.

It's easy for me to spend your money. Use the advice you like, build it how you want it. Just some friendly thoughts.


Just another random thought, after looking this over: If they will place a transformer for you pretty cheap like mine did, have a transformer 200 amp service placed at the exsisting barn. Run a short run to the house of 300 feet, and a short run of 200 feet to the future barn. Shorter runs have less voltage drop which uses thinner wire, which costs you less. A centrally located transformer would cost you less then a transformer on one end. See what policies your utility has, use them to your advantage.....

--->Paul

 

[Mark_in_NH]

First and most important. Go seek the advice and knowledge of an actual , licensed electrical contractor in your area. He will most likely know what your power company will require and what would be expected of you.
Rules, regulations and requirements differ from state to state and from one electrical provider to another. The advice your seeking from this forum is on a "this is what I would do if it was me" basis. Some of it may well be correct and sound. The world is full of arm chair electrictions. I spent about 12 years in the electrical contracting field myself working with my Father. That doesn't mean I have a clue about what is required in your area of Texas. The "National Electric Code" is a complex and ever changing code. Please get the proper and qualified advice in order to do this job only once and most of all Safely.
Go see your local power provider, I am sure that they will give you some names of qualified electrical contractors. They may well be able to and willing to survey your site and tell you what needs to be done to do the job properly, adequetly and safely.

 

[Gary Fowler]

You power company surveyor will advise you on what he can do for free and what the alternatives are. They may move the one pole to another location for free. When I asked about putting in another pole on my place to get the overhead wire out of my way somewhat it was $1100 to put in a pole. Needless to say, I moved my building 15 feet. Your roof line has to be at least 15 feet back from the overhead wires. Your diagram if accurate shows the line cutting across your roof which isnt allowed. Discuss with the power company the possibility of relocating the existing power poles and meters to a more workable solution. It may be free to do that since all the material is already there. All my overhead lines are free but underground is close to $10 per foot for 200 amp service. I am waiting for a survey of my new house site now to see what the best way is to get my power in. and not have a pole in my front yard.

 

[heitjer]

Thanks for your tips!

I am definitively will seek professional help and only do what will be indicated to me as a possible option when it is in my capabilities (i.e. trenching).

I will go 60 amps for the horse barn as indicated by Paul as I may have some other use for electricity at the fish pond and further down the pasture. Thanks!

I also like the comment to ask the power company to bring the transformer onto my property and closer to the pole barn. I will ask about that. Currently the transformer for pole #1 sits in the corner (far left in picture) of the property. The transformer for pole #2 sits in the other corner (bottom of picture). That will result in the shortest runs. And when we build the home in 2 years we may even use the second electrical pole closer to the home.

Drawing of property, barns and possible house is to scale.

 

[eepete]

Everyone right on the money with advice on talking to local power company and electricians.

I like everything buried. Less lightning problems, looks better. One piece of data missing here is who makes and owns the trenching if you go this route. I had a small backhoe, and dug about 1200 feet of trenches for power, phone, lighting and the like. An advantage of this approach (the "I can put what I want in the trench" is you can also run low voltage (phone, security, data) and water to these locations. If you can do this, it spreads out the cost over all these pieces of infrastructure.
If the utility company just puts in wire (no conduit), then you're going to be digging for these other things anyway. Local ground conditions (rocky, sandy, etc and problems with burrowing critters) also affect this decision.
You have about 350 feet of trenches on your map. Note that if you go down deep enough, and make good records of where the trenches are, you could do a direct path. 350 feet seems like about a days work for a real backhoe. A direct path would be less time but still a full day if you went deeper (like 3-4 feet deep). You could contract someone to dig it for you, then put the pipe in for power, low voltage, and water. Post if this option is interesting, then you can get lots of advice on sizes and cost of conduit and wire. Make sure you get the power company to agree on the size for the power.

Also agree that 20A into the horse barn is too small. 60 amp-ish is much better. Note that the right size conduit give you more room to make mistakes.

Pete

 

[thunderworks]

You've had lots of good advice on sizing your service . . . your question though was about overhead vs. underground. Whatever size of service you decide on to each location, the over/under topic remains. I can't advise regarding the costs- only you can do that. When we built our house/shop/barn etc. we decided on underground. The primary reason we did it was aesthetic. It's impossible to put a dollar figure on the value of aesthetics, but after visiting Amish country in Pennsylvania a few years ago, I realized that one of the most prominent visual features of the area was the lack of power line everywhere. To me it's big deal, and worth the money. Clearly a personal thing. Your mileage may vary.

 

[matt_isserstedt]

Just to be the devil's advocate for a minute.

The simplest solution I see is to use pole #2 for your house.

It is a shorter, straight shot from pole #1 to the barn underground. 200A service as stated, then sub-panel over to the horse barn.

20A @ 240vac might be enough...thats the same power/wattage as 40A @ 120vac. However I think I'd lean towards 30@240vac if you were trying to save.

My REA has a simple rule for underground service: you get two bends, both of them turning up from the buried horizontal run to both of the vertical legs feeding the: (power pole, meter base). Everything else has to be a "natural curve" that the 2-1/2" PVC conduit will flex to. Otherwise pulling the wires thru would be a nightmare.

I do also prefer the "clean" look of minimal overhead power lines.

 

[mikefromnh]

My first thought is to go overhead from post 1 to barn (200 amp) and then underground to the house (100 amp) and everywhere else. I've done similar before and it has worked for me.

 

[GPintheMitten]

My first thought is to go overhead from post 1 to barn (200 amp) and then underground to the house (100 amp) and everywhere else. I've done similar before and it has worked for me.

I like that idea too. 100 amp at house at first seems low, but it is not feeding any other subpanels. But be sure you get enough at the house.

See if the power company will remove pole #2 but maybe not until after the house is built. It will give you power for the construction job.

Also, consider putting your house electrical panel in the corner of the future house nearest the existing barn.

I also like the idea of 1 trench for power, water, and low voltage. Check on how much separation is required from those services. Also, consider how you would perform repairs on a given utility in a shared trench. If one fails, you don't want to disturb others. Maybe make them in the same but wider trench and place them in separate conduits as separated as possible and well documented.

You don't want future work by you or future owner to hit this stuff with a post hole digger or something.