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4/0 (4 ought) in copper will handle 250 amps. The voltage drop at 175 ft. is about 2.14 volts which should be okay.

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Q: What size wire for 250 amp service with a 175 foot run?
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What size aluminum wire to feed 125 Amps 220 volt a distance of 175' and what size ground?

A 3/0 aluminum conductor will limit the voltage drop to3% or less when supplying 125 amps for 175 feet on a 220 volt system. If the 125 amp load is a sub distribution panel that is not going to be fully loaded to 125 amps then using the exact connected load, which might be smaller than 125 amps will effect the wire sizing. The grounding conductor for that size distribution panel is #6 bare copper.


How many amps will a 2 0 wire carry?

If you mean 2/0 copper wire it is rated 175 amps. # 2 wire is 115 amps. If you are referring to 2.0 metric it is rated 15 amps.


What size of fuse should be used for 75 hp 415v 3 phase motor connection?

To answer this question, wire size is rated in the amount of amperage that it can legally carry. Fuse sizing is based on the amperage that the wire carries. The formula to find amperage when the HP is known is I = HP x 746/1.73 x E x %eff x pf. A standard motor's efficiency between 5 to 100 HP is .84 to .91. A standard motor's power factor between 10 to 100 HP is .86 to .92. Amps = 30 x 746 = 55950 = 55950/ 1.73 x 415 x .87 x .87 = 55950/550 = 101 amps. The electrical code states that a motor conductor has to be rated at 125% of the motors full load amperage. 101 x 125% = 126 amps A #2 copper conductor with an insulation factor of 90 degrees C is rated at 130 amps. Fusing for this motor will be, non time delay fuse 300 amps, time delay fuse 175 amps or a circuit breaker rated at 250 amps.


Why Metal halide fixture with a 175 w bulb and correct ballast could overheat?

Make sure you are using a metal halide bulb and the ballast is matched to the wattage on the bulb. These both must be correct.


Is a 60 amp electrical panel a 2800 sq ft home the correct size to small or over sized?

That sounds way too small. I think the standard these days is 200 amp.That's because of all the modern appliances that we have now, like air conditioners ,microwave ovens, garbage disposals....you name it. Plusfunaces,electric heating, refrigerators really should be on their own separatecircuit breakers. Lighting should also be on circuit breakers,separate from wall outlets,so that if you trip a breaker ,say with a vacuum cleaner,you won't be in the dark (safety).Who knows ,you may even be needing tocharge your electric vehicle a few years down the line....AnswerThe electrical amperage is nothing to do with the area of the house. For correct size specifications, electrical power requirements need to be calculated.AnswerMost newer homes will not need more than 200 amp main panel. While the above answer is correct that amperage has nothing to do with the area of the house, a good rule of thumb for a residence is usually 7.5watts/sq. ft. which comes out to about 175 amps. In the end, you will rarely have anyone actually calculate the actual demand load on a single family dwelling. So the rule of thumb is what will mostly be used.