The minimum size conductor needed based on a 3% Voltage Drop for a 120 volt single phase service is 2/0 copper or 4/0 aluminum. It does not take into consideration other… factors such as minimum ampacity based on the National Electric Code Table 310-16. ( Allowable ampacitys of conductors ). Consult The National Electrical Code for further details. For further information search for "Voltage Drop Calculator".
Please use the Discussion Area to explain the significance of the "100 feet".
Wattage is really what is needed. If you are working with DC voltage, Ohm's Law is at work. But to answer your question directly probably a #4 wire. To answer this question t…he circuit's voltage needs to be stated. Then a voltage drop calculation can be made.
Answer for USA, Canada and countries running a 60 Hz power supply service. 125 Amps is a very heavy current load for a household circuit so this 340 ft run may …be for some industrial plant or equipment... You really should know how to handle wiring size calculations already before you install that kind of stuff. To do a proper calculation, working voltage is needed, whether it is single phase or three phase and whether the wire is copper or aluminium. Single phase - 125 amps at 120 volts, copper wire #3/0, 125 amps at 240 volts, copper wire #1 Three phase - 125 amps at 480 volts, copper wire #4 ----- As always, if you are in doubt about what to do, the best advice anyone should give you is to call a licensed electrician to advise what work is needed. Before you do any work yourself, on electrical circuits, equipment or appliances, always use a test meter to ensure the circuit is, in fact, de-energized. IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOB SAFELY AND COMPETENTLY REFER THIS WORK TO QUALIFIED PROFESSIONALS.
The answer to this depends on many factors. I would recommend consulting a professional electrician, or familiarizing yourself with at least Article 310.16 of the Nation…al Electrical Code.
8AWG * Gauge
Need to know the voltage the circuit operates on. ANOTHER ANSWER For the typical house voltage, I would recommend an 8 gauge wire, but you could probably get by …with 10.
its posable that 100amps direct burial cable (copper at your best) in my sugestion should be a minium size of 2/0 and ground size of #2 this is stepped up for voltage drop con…cerns. check your authority first prior to any work ,
Answer for USA, Canada and countries running a 60 Hz supply service. The simple answer is #8 AWG. But this assumes you are using THHN or similarly insulated wire. Generall…y, THHN is what you get when you go to the hardware store, and it DOES MATTER! As always, if you are in doubt about what to do, the best advice anyone should give you is to call a licensed electrician to advise what work is needed. Before you do any work yourself, on electrical circuits, equipment or appliances, always use a test meter to ensure the circuit is, in fact, de-energized. IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOB SAFELY AND COMPETENTLY REFER THIS WORK TO QUALIFIED PROFESSIONALS.
This is a voltage drop question. A voltage must be stated to answer this question..
This question is best answered by knowing what equipment will be connected to the outlets, and what their expected current draw should be. It is also necessary to know what yo…ur voltage is.
The question is one of voltage loss. The goal is to have enough ampacity in the selected conductors to run the maximum load with only 3 percent voltage drop, caused by the res…istance inherent in the wires. Plug your numbers into a voltage drop calculator online and see what pops out. At 120 volts you would get 3.1 percent drop using 3/0 wire. At 240 volts you could drop down three sizes to #1 AWG for 3.1 percent at max load, or 1/0 size for 2.5 percent drop at max load. Assuming copper wire at normal conditions of temperature.
I would recommend you use #8 due to the distance.
To answer this question a voltage needs to be stated.
That distance you are going to have to install a sub-panel and runAWG # 4 wire and even then you will have a voltage drop of 7.45volts giving you 232.55 volts at the sub-panel… which is acceptable.