It depends upon whether you mean 240 volts at the first end or the second end.
Assuming 240 volts at the source, and allowing no more than a 3 percent voltage drop over the 200-foot circuit, at 100 percent load of 100 amps, you would need a #1 copper conductor. You would only have 233 volts at the far end at full load.
Note that if the ampacity of conductors supplying your connection point is not sufficient, the "supplied voltage" on your new extension could be substantially diminished under load. For instance, if you are already 100 feet from the original 240 volts, your extension would have an effective circuit distance of 300 feet, requiring #2/0 conductors.
It depends on the voltage but on a 240 v system the volt drop could go to 5% at the maximum load current, which is 12 v, therefore the total resistance allowed is 12/100 ohms or 0.12 ohms.
The wire length is 600 ft for 0.12 ohms therefore the wire size should allow a maximum of 0.2 ohms per 1000 ft, which would be #3 wire if copper or #1 if aluminium.
Wire sizes are normally even so the answer for aluminimum is #0.
First, alum is not a metallic substance usable as a wire or electrical conductor. You probably mean aluminum and should be aware that they are not the same.
An aluminum wire expected to carry 50 amp power load (assuming 120 volts) should be a 6 AWG (guage) wire. For longer wire runs, the increased resistance may cause a voltage drop and a thicker wire could be considered. The same is true for a lower voltage than 120 volts.
To answer this question correctly a voltage must be stated.
A 300 MCM aluminium conductor will limit the voltage drop to 3% or less when supplying 100 amps for 300 feet on a 120 volt system.
A 3/0 aluminium conductor will limit the voltage drop to 3% or less when supplying 100 amps for 300 feet on a 240 volt system.
A 1/0 aluminium conductor will limit the voltage drop to 3% or less when supplying 100 amps for 300 feet on a 480 volt system.
As you can see the higher the voltage of the circuit, the smaller the conductor for that circuit becomes.
This is a voltage drop question. Without a voltage stated an answer can not be given. Also whether the run is three phase or single phase must be stated.
That said, and on the assumption that the the run is single phase, I will calculate for 120 and 240 volts.
A 1/0 aluminum conductor will limit the voltage drop to 3% or less when supplying 50 amps for 200 feet on a 120 volt system.
A #3 aluminum conductor will limit the voltage drop to 3% or less when supplying 50 amps for 200 feet on a 240 volt system.
The answer below this one using a #6 conductor at 120 volts would only allow a 10 amp load before the voltage starts to drop off.
Please use the Discussion Area to explain the significance of the "100 feet".
A 2/0 aluminum conductor, with an insulation factor of 90 degrees C, when supplying 100 amps for 200 feet on a 240 volt system, will work.
Buried or conduit #2/0 aluminum will exceed the NEC recommended 3% or less and provide a 2.72% drop
Increasing to 3/0 provides a 2.26% drop
Make sure you resize your ground.
There is not enough information to answer this question. What is also needed is voltage, single or three phase and whether the installation is direct bury, overhead, or in a conduit system.
AWG # 4/0 alluminum or AWG # 3/0 copper
This is a voltage drop question. To receive an answer to this question the voltage of the service must be stated.
Yes, as long as it has the necessary ampacity for the load and is properly fastened at each terminal. For example, we have a 4/0 aluminum cable feeding our 200 A subpanel 120 feet away.
A 350 MCM copper conductor will limit the voltage drop to 3% or less when supplying 200 amps for 650 feet on a 240 volt system.
no .it will not supply
Service conduit must be secured every 10 feet and withing 3 feet of a service box.
Your service provider will give you that information The size will depend on: A) how close to the transformer are you. B) copper or aluminum C) Yes, you have a 400amp service but what will your actual peak amp usage be. D) Underground or overhead.
I would use AWG #4 for that run in alluminum. You will have a 3.8% voltage drop which is acceptible.
I would use AWG #4 for that run in alluminum. You will have a 3.8% voltage drop which is acceptible.
# 6 copper wire.
A 1/0 aluminum conductor will limit the voltage drop to 3% or less when supplying 30 amps for 500 feet on a 240 volt system.
A transformer
This is a voltage drop question. To receive an answer to this question the voltage of the service must be stated.
If you do not have a underground metal water pipe coming into the building then you put a ground rod at least 2 feet from the buildingf into the ground attach one end of the wire to ground rod run your ground wire and attach the other end to the neautral bar in the panel box. You need special transformer called as grounding transformer for this purpose. Grounding transformer is basically Wye-Delta type transformer with Wye connected winding connected to 3 line wires and derived neutral from Wye side grounded through desired grounding device. Delta side winding of grounding transformer is kept at no load.
The underground railway was NOT underground. It was a trail leading the black to safety.
AWG 2/0 copper.
six feet underground
Yes, as long as it has the necessary ampacity for the load and is properly fastened at each terminal. For example, we have a 4/0 aluminum cable feeding our 200 A subpanel 120 feet away.