Title: Direct Burial Optical Fiber for 250m Distance: Single-Mode Fiber Recommendations & Tips

Hello. I wanted to connect two buildings with optical fiber for monitoring purposes. The distance between the buildings is about 250m. Recorder in one building, 7 cameras in the other. I plan to lay a single-mode fiber in the same trench where the power cable of one of the buildings will be. I need advice, can I lay the fiber directly in the ground (if so, which one do you recommend)?
I would like to add that I do not need a dozen spare fibers, I care more that nothing happens to it in the ground and that I, as a novice in the topic, do not damage it during laying. On the forums I read that there must be a casing pipe, some manholes, etc. I treat the topic more as an alternative to utp which (if not for the distance) I would hit the trench directly and would not think twice. Overall, HDPE pipe is inexpensive, but I am more concerned about how to pull the cable through 250m of one pipe pipe.


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Since there will also be a power cable and it should be in arota - they are in sections even after 25m. and "stretching" such a piece at such distances is not a problem.
It's always better to have at least one more fiber in stock.
Another option is to use a wireless bridge as long as there is visibility between buildings.

Sosarek I am not sure if the feeder will be in arota. Generally, I wonder about the sense of laying typical earth cables in additional pipes / sheaths for no specific reason. It seems to me that water may collect in these pipes. Of course I could be wrong.
How do you do in such situations?
The bridge falls off, if it was possible it probably wouldn't be the topic. But I knew that the confrontation with the light would not pass me sooner or later ?

adjan_ek wrote:

Generally, I wonder about the sense of laying typical earth cables in additional pipes / sheaths for no specific reason.

There are several reasons for this - from an unprotected cable that can chew on anything, to accidental damage, e.g. by digging up here on thousands of other "impossible" scenarios.

adjan_ek wrote:

It seems to me that water may collect in these pipes. Of course I could be wrong.

If it is tightly connected with sleeves, it is not damaged, nothing like that can happen, in addition, it will not hurt typical earth cables.
In addition, the remote control is always left to be able to add something in the future. The most important thing is to keep the turning radius.
Inside - the optical fiber must not be broken at an angle of 90 degrees. or smaller - the turning radius can be calculated from the diameter.

There are fiber optic cables to be laid directly in the ground, I have put it successfully with an electrician.

adjan_ek wrote:

Generally, I wonder about the sense of laying typical earth cables in additional pipes / sheaths for no specific reason. It seems to me that water may collect in these pipes.

Water is not a problem for the earth cable as long as its insulation is not damaged.
The Arot pipe in this case helps to protect the outer insulation of the cable from damage.

joy wrote:

There are fiber optic cables to be laid directly in the ground

Yes, they are called earth faults, but the optical fiber itself is exposed to damage without additional protection - it is better to do it once properly than dig it up and install a new one in six months.

According to the seller's data, "with a central tube designed to be directly buried in the ground, resistant to crushing" 4kN, and "Outer shell Polyethylene PP / HDPE"
I put it down a bit and have no problems. HDPE is the best option, but you have to lay it down well and the cost comes.

joy wrote:

HDPE is the best option, but you have to lay it well plus cost.

Then you have the option of replacing the cable without digging it up again.

joy wrote:

HDPE is the best option, but you have to lay it down well and the cost comes.

The electric cable should also be secured, a blue tape should be placed on the pipe, and the cable itself, no matter what they would say in its description, is exposed to damage - if that were not the case, why are casing pipes commonly used everywhere, for example https://www.speckable.pl/ product / 4641 / Corrugated-pipe-RODK-DVR-50-blue, -to-the-ground-25m.html? ref = l2

sosarek wrote:

adjan_ek wrote:
It seems to me that water may collect in these pipes. Of course I could be wrong.

If it is tightly connected with couplings, it is not damaged, nothing like that can happen

You can see that my colleague @sosarek is a theoretician and he has never held arota in his hand, otherwise he would not have written that the connection with the muffs is tight and water has no right to get in.

sosarek wrote:

joy wrote:

There are fiber optic cables to be laid directly in the ground

Yes, they are called earth faults, but the optical fiber itself is exposed to damage without additional protection - it is better to do it once properly than dig it up and install a new one in six months.

Another theorizing of my colleague Sosarek. What is the cable exposed to in the ground ??? Maybe moles ??? or maybe on turkucia snack ??? Somehow, I have not heard anyone replace the electrical connection buried in the ground without a casing pipe, and according to you, Sosarek, it should be common. Do you only write to beat foam?
I will give you a typical to-ground optical fiber and try to damage it the first time you put the shovel in, where the earth-to-earth optical fiber will be at a depth of less than an engraving, then I will buy you a case of beer. I would not believe it if I did not see how resistant such a fiber to mechanical damage is. You can also see, according to the catalog notes, how it is constructed so as not to tell such nonsense.

To the author of the topic, if you arrange it in accordance with the art, you minimize the possibility of damaging a very resistant cable. The arota pipe is future-proof, you can always add something to replace, the water in the pipe collects it is normal and has no effect on the ground calbs sucked into the arota. But at a distance of 250m you should have manholes so that it is easier to be able to pull something else in. The remote control is unlikely to withstand pulling at this distance, as it is only made of fiberglass, so it would be worth giving at least 2 or 3 wells along the way. It makes life much easier afterwards. Arot is available in sections of 25 or 50 m. Arota should also be placed with a spare diameter, because by fi 32 over a distance of 100m you will get tired quite a bit. When pulling the cables into the arota, all types of lubricants designed for this help (and even ordinary dishwashing liquid, e.g. Ludwik, but the original one )

adversus wrote:

You can see that my colleague @sosarek is a theoretician and he has never held arota in his hand, otherwise he would not have written that the connection with the muffs is tight and water has no right to get in.

I see that you write only to beat the foam again - if you think otherwise, prove it, the joint can always be secured with self-amalgamating tape.

adversus wrote:

I'll give you a typical to-ground fiber and try to damage it the first time you put the shovel down, I'll buy you a case of beer. I would not believe it if I did not see how resistant such a fiber to mechanical damage is.

Especially placed on a hard compact layer of compacted earth - unless you bury it 5 cm ...

adversus wrote:

You can also see, according to the catalog notes, how it is constructed so as not to tell such nonsense.

Well, and that's why they often recommend laying it in casing pipes, or preferably in OPTO ...

As I wrote before, you theorize and introduce unnecessary confusion. I have not heard about a series of fiber optic failures that, for example, Inea buried when it was wiring around Poznań and no arota was placed there. I can show you, as an unbeliever, photos of the works, how Inea was arranging and burying the optical fiber because I was often on the connections and activations of the light at my clients and I documented it on the other hand. Somehow, no one has damaged the optical fiber for several years. So don't sow defeatism. If the author has a budget for arota, he will do it, but it is enough to bury the optical fiber intended for this and forget about it.

sosarek wrote:

I see that you write only to beat the foam again - if you think otherwise, prove it, the joint can always be secured with self-amalgamating tape.

Show me the team that encapsulates arota, seriously ... Or just the tape to encapsulate arota Because you write out the next crap.

Show recommendations for laying a fiber optic cable in the protective tube, since you are so smart. I'd love to learn something new.

adversus wrote:

I have not heard about a series of fiber optic failures that, for example, Inea buried when it was wiring around Poznań and no arota was placed there.

No, because they use OPTO and install manholes, just like Orange, Netia ...

adversus wrote:

I can show you, as an unbeliever, photos of the works how Inea was arranging and burying the optical fiber because I was often on the connections and activations of the light at my clients and I documented it on the other hand.

And you have documentation from the post in front of the property to the collection point at the customer's home, not the entire installation from the distribution point ...

adversus wrote:

If the author has a budget for arota, he will do it, but it is enough to bury the optical fiber intended for this and forget about it.

adjan_ek wrote:

All in all, HDPE pipe is inexpensive

wodzu_1 wrote:

The Arot pipe in this case helps to protect the outer insulation of the cable from damage.

Besides, I wonder how many times you will change your previous statements in the topic to prove your "right".

Just my "inventions"?

adversus wrote:

Show recommendations for laying a fiber optic cable in the protective tube, since you are so smart. I'd love to learn something new.

https://www.elektroda.pl/rtvforum/topic3517360.html

sosarek wrote:

No, because they use OPTO and install manholes, just like Orange, Netia ...

Can't you read? I wrote to you that I can show you the documentation of how Inea is doing. And not from the post to the house, but from the hub to the post and beyond. I was and I saw. And somehow there is no breakdown and no casing pipes, don't you get it? Should I draw it for you?

Manholes and pipes are laid in the city so as not to dig pavements and streets every now and then when the network is modernized. And this is why a fiber optic cable was invented to reduce costs and not to lay an additional casing pipe, which is an additional cost in places where one fiber optic cable is laid and modernization is not planned anymore.
In the case of arota, the price for 1 meter is similar to the price for 1 meter of fiber optic cable. You really have no idea what you are writing about.
You cite other users and say that I change my mind about what? Concentrate on your speech because it is quite chaotic.

adversus wrote:

Can't you read? I wrote to you that I can show you the documentation of how Inea is doing.

So show, and not in every topic where you support yourself with such things, you claim that you do not have to prove anything.

adversus wrote:

You cite other users and say that I change my mind about what?

I gave you a link to one of the topics where people who were speaking ate their teeth on it - since their arguments also do not prove anything ...

adversus wrote:

Concentrate on your speech because it is quite chaotic.

Where? You're making a dumpster from the Author's theme again.

Read with understanding.

adversus wrote:

Manholes and pipes are laid in the city so as not to dig pavements and streets every now and then when the network is modernized. And this is why a fiber optic cable was invented to reduce costs and not to lay an additional casing pipe, which is an additional cost in places where one fiber optic cable is laid and modernization is not planned anymore.
In the case of arota, the price for 1 meter is similar to the price of 1 meter of fiber optic cable. You really have no idea what you are writing about.

I have an education in this field, my friend, telecommunications and teletransmission are departments that educated people in this field during the times of industry schools, so what are you writing to me about?

adversus wrote:

Read with understanding.

https://www.elektroda.pl/rtvforum/topic3517360.html

sosarek wrote:

adversus wrote:

Read with understanding.

https://www.elektroda.pl/rtvforum/topic3517360.html

Nothing comes of this. except that such a network should be applied to the geodetic documentation. In the old technology, fiber optic networks were blown into HDPE pipes ... you are not up to date, buddy
Somehow, outside the city, no one is laying pipes, only the light goes to the ground.

You have a movie of disbelief ...
https://youtu.be/Tf_XJ-l19F8?t=54

adversus wrote:

I can show you, as an unbeliever, photos of the works, how Inea was arranging and burying the optical fiber because I was often on the connections and activations of the light at my clients and I documented it on the other hand.

For what a movie with YT

adversus wrote:

You have a movie of disbelief ...
https://youtu.be/Tf XJ-l19F8? t = 54

Again, there are no substantive arguments in the discussion and the content of the post has been changed and added

adversus wrote:

I have an education in this field, my friend, telecommunications and teletransmission are departments that educated people in this field during the times of industry schools, so what are you writing to me about?

Only judging by the age, this applied to other broadcast media ...

Read since when there are optical fibers in Poland and do not write crap, read about technology and construction as with property and then speak out because so far, buddy, you are getting more and more. The technology of building ICT networks is the same, only other media.

I will only add from myself that in the Bydgoszcz area, a certain company was burying pipes for future optical fibers - it was at the end of 2019 (as far as I know, there is a plan called "Optical fiber for schools" or something like that).

A small excavator was driving, (usually) making a narrow groove in the ditch by the road, behind it the team that unrolled the black casing pipe and put it into the trench. After a few weeks, another team was blowing the optical fiber. Then, using the infrastructure of the former TP (now it is Orange), it went from the optical fiber underground, they made connections in the fiber optic connector on the pole and then hung it along the existing overhead line until it reached its destination. They did it in my neighborhood in several places (optical fiber from the city to the village a few km away) ?

dawidedziu wrote:

the team that unrolled the black casing pipe and put it into this trench

Could something like that? https://elektryczny.pl/rura-opto-hdpe-32x2-9-hdpe-32x2-9-cza-kopos-p10067
At smaller distances, I unroll the cables as far as possible, I hook on one side and on the stretched cables I put arota on from the end, going to the beginning, and so several times and no need to drag Well, unless it's already buried in the ground.

sosarek wrote:

Could something like that? https://elektryczny.pl/rura-opto-hdpe-32x2-9-hdpe-32x2-9-cza-kopos-p10067

Something like that - with such a colorful stripe.

dawidedziu wrote:

I will only interfere with myself so much that in the Bydgoszcz area, a company was burying pipes for future optical fibers

Pipe laying in the city is the norm, outside the city depending on the network and contractor (project). The author of the topic has a piece of optical fiber to make in the company, he does not have to apply for projects and permits. He can also arrange pipes, but he can also arrange a typical to-ground optical fiber that another colleague wrote about.

joy wrote:

According to the seller's data, "with a central tube designed to be directly buried in the ground, resistant to crushing" 4kN, and "Outer shell Polyethylene PP / HDPE"

adversus wrote:

Pipe laying in the city is the norm, outside the city depending on the network and contractor (project).

After a while, I edited my post and wrote:

dawidedziu wrote:

optical fiber from the city to the village a few km away) ?

.
The city has 15 thousand inhabitants, and the village has about 1 thousand.


What, in my opinion, does not change the fact that when doing for yourself, you should do it in such a way that in the future you only have a grudge against yourself - so either the pipe or the optical fiber itself, or both together ...

I do not deny it and even I'm for It all depends on the wealth of the investor's portfolio.

A cable intended to be laid directly in the ground can be laid directly in the ground, but under certain conditions. The cable should lie on a layer and be covered with sand, not ordinary soil. The point is that sharp stones (which may be in the ground from the excavation) do not touch the cable and, due to the pressure of the ground above them, do not slowly stick into the cable.
A strip of warning foil should be put on the sand layer and then covered with soil. In electric wholesalers there are rolls of foil with a width of several centimeters in various colors. I think blue for 230V, red for high voltage, yellow for gas and orange for telecommunications. In a few years, when someone digs and hits the foil, they will know that you have to be careful with the cable.
The worst thing that can be done is to sprinkle the cable directly with rubble to prevent it from being accidentally dug up.

The trench should be at least 80 cm (I don't remember exactly). There are several reasons for which I have heard:
- we will not damage the cable by digging flower beds in the garden or by digging the lawn,
- it is said that the pressure from trucks or other heavy things placed on the ground is better distributed,
- this is the freezing point and the cable lies in the ground at a more or less constant temperature. The ground and cable then do not "work" due to thermal expansion.


Of course, this can be ignored and for several years the earth cable should be able to withstand even stony ground without any problems.

I wrote about this in post # 9.
The author of the post will do as he wishes, we have no influence on it.

The topic returns like a boomerang and always arouses a lot of emotions. And it seems so simple
Once upon a time, I collected a few such topics and linked them to them in our guides. I thought this would do the trick, clear up a few things. Probably, however, it will have to be better elaborated and to some even have to be read compulsorily. Or maybe so, such a guide would be developed by a colleague @sosarek on the basis of the collected materials and this topic? By the way, maybe he will learn something himself, consolidate (this is probably a good word in this case) his knowledge about laying cables in the ground ;)



https://www.elektroda.pl/rtvforum/topic3683676.html


I rejected all reports. When writing without much thought, just to write, we have to reckon with the fact that someone will write a few words of truth for us and it will not always be pleasant for us.