100 mts Electrical Conductor

Google, "wire sizing".

There are many sites that will do it for you.

You should really hire someone who knows something about electricity.

10 Kw will be lethal in your hands.

Such as :

Don't kill innocent people!

Hire a qualified Electrician, meany-knickers!

It would be remiss of us to advise you in any way other than to advise you to get professional assistance.

I agree with group members, hire somebody who prepare a calculation for you.

But is usually for cable size calculation, it's necessary to know the minimum voltage required by your load. In your case 440 Vac (three phase I guess), should be the minimum requirement, so you should considering this value, and, by

- distance

- current

- cable specification

calculate voltage drop. If your cable will be too small you can have severe trouble with potential cable fire. if cable is too large you will have loss of money and difficulty of installation.

Would advise not to depend upon us for sizing but to hire a professional.

100 meter is pretty long for cable. We do not know the conditions,

whether it is urban or rural area.

Whether it is being laid under ground or over hung on poles.

Conductor type Cu or Al.

How would you protect other against accidental damage to cable.

To ensure continuity of safety earth between source and load.

What is the maximum and minimum ambient around and whether the cable will be exposed to sun light.

Etc. Etc.

There are many factors is selection, laying and connection of cables and when you do not have knowledge of Electrical Engineering, better hire someone.

Compare the cost of running such a long wiring against buying a dedicated generator or re-locating the existing one.

Consider step-up xformer at source and step-down at load for a dramatic wire gauge and cost reduction (minus the cost of the xformers, of course).

Mention this to the person you hire for the job.

Yahlasit

"...Compare the cost of running such a long wiring against buying a dedicated generator or re-locating the existing one...."

Considering a dedicate Generator, or relocate a generator for only 1 load of 10 kW seems to have an higher cost than build a simple project or not ?!!?

100 meter for electricity in a power and / or industrial plant are nothing.

A little knowledge is dangerous.

Asking such a question would be like trying to learn how handle and disarm an explosive device without any previous training.

And electricity is explosive.

And deadly.

Do not think otherwise.

That is why installation of equipment should be performed by, or under the direct supervision of a qualified and licensed individual.

There are plenty of references on line, but I will not participate in leading a lamb to the slaughter.

Get professional qualified help.

OK, turn on the power.

There is something that looks like a bomb at the back of my yard .. Actually Am sure it is a Bomb ... Please can someone help me on which wires to cut and/or how to disarm this Bomb because i have no idea about Bombs !!!! ...

Other posters have warned against seeking a simple answer without explaining why. I will try to remedy that. The cable size desired is usually the smallest/cheapest that will do the job. To select this size the various ways of delivering the power need to be known. For example. An uninsulated wire run in the air can be smaller (cheaper) than an armoured and insulated cable inside a plastic conduit. Note that I am just talking about the number of and size of conductors. A cable run in the ground is different again.

It is all about the heat. An uninsulated cable in the air can be very hot, hot enough to melt plastic and so that size of cable ( conductor/s ) cannot be insulted with plastic. To keep the conductors cool enough to prevent the plastic melting they need to be bigger. Running the cable underground helps cooling but if it is in a conduit heat builds up. If it goes into concrete......etc.

It is for these reasons the posters have said you need professional help. In Australia an installation such as this HAS to be signed off and installed by a licensed electrician. S/he could lose their license if they don't follow the A.S. ( standard ) within which all the cable/conductor sizes are spelt out.

Jim

"Other posters have warned against seeking a simple answer without explaining why."
The starting question concern the request a sizing of the cable, installation was not mentioned.I think that originator of question will be very happy about your suggestions about installation option, but the installation issue will follow the cable sizing.

From the opening post:

"I understand nothing about electricity."

If one knows nothing about electricity, one knows nothing about electricity including how to make proper connections to the correct terminations.

I explained, "You should really hire someone who knows something about electricity. 10 Kw will be lethal in your hands." #1

Any competent electrician will know what size cable to use either through experience, or the little code book he carries in his tool box.

You are new here, so you have no idea how many people come here who know absolutely nothing about the dangers associated with 10 Kw at 440V and ask how to size the conductors, having no intention of doing anything but saving a few dollars.

Or, how many people come here wanting the forum to literally do their work, or homework, for them.

If the NEC is applicable to the location that you are in:

Please refer to NFPA 70E - NEC 240.4(D)

If you were located in the USA and if the installation is underground and in conduit, the minimum wire size would be 8 AWG stranded copper wire with insulation type THWN or better.

If you are using direct burial cable, and not using conduit, or running the power overhead, the wire requirement factors change as per the NEC tables.

As you can see there are many factors to consider that are dependent on local code requirements and installation parameters.

It is imperative that you contact your local electrical code enforcement agency, obtain a copy of their requirements, and follow them closely.

It may be that only a licensed contractor is allowed to perform the installation at your location.

If you cannot understand the local code and/or how to use the NEC tables, you really need to hire a local contractor.

If I were to answer this it would go something like this:

Assuming mts means meters.

Assuming an indoor application.

Assuming individual conductors in conduit.

Assuming a plant mounted motor on a pad.

Assuming normal plant ambient temperatures.

Assuming.....

See the problem here.

Conductors that supply a single motor used in a continuous duty application shall have an ampacity of not less than 125 percent of the motor full-load current rating.

Based on your power and voltage (10 Kw, 440) we will assume a two-phase AC motor (4-wire). At 10 Kw, rudimentary calculation reveals about a 13 horse motor...let's say 15 for a nice round number. That translates to 18A. If using a 2-phase 3-wire, 25A.

(If you need numbers for a three-phase motor, ask.)

Anyway, how you run the wiring and what environmental conditions, etc. play a huge part in the wire size choice. So, what are the detailed specifications for your water pump? What is the duty cycle (continuous load)? What is the ambient temperature for the run? What type of wire do you want to use (environment, again)? Do you have material on hand that you want to use and need a determination if it is safe?

More info please.