I requirement 220 volt service, 125 amps, and its 235' from the breaker. What size cable do I stipulation? I have a mobile mini that requires 220 volt 125 amp...
I have a mobile mini that requires 220 volt 125 amp service. My breaker box is 230' away. A buddy say use 2/0 aluminum wire, is that overkill or can I draw from by with mediocre wire? Also will I stipulation 235' of this stuff or do I need 2 pieces at 235' respectively? Also isnt this stuff too thick to fit into a usual breaker?
If it will be direct burial cable, you will solitary need the 235 foot you mentioned, it will have 3 conductors and a ground chain in it. The 2/0 is around right for the length of the run to avoid excess splash loss. You might consider hiring an electrical contractor to do the work correctly, and to compute the line loss involved for the run.
The service entrance conducters are sized by the actual load not the service disconnect. Therefore you would own to do a load subtraction in demand to correctly determine the wire size. I don't know what a mobile "mini" is but if its similar to a mobile home then you should look out there are some prettey specific requirements that are unlike most residential services. not to discourage you but this may be one to take off to a pro. Doing it yourself twice cost more than a pro doing once.
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Answers: I am a licensed electrician of 3 years, and been surrounded by the trade for over 10 years. 1 conductor per phase utilizing a 2/0 kcmil Copper conductor will limit the voltage drop to 2.66% or smaller number when supplying 125 amps for 235 feet on a 240 volt system.
You would not want to run aluminum as you would obligation 2 times the size wire. Stick near the copper, its better overall as a conductor, plus its smaller diameter will be easier to work with. It will, however be like mad more money. You will need 3 runs of this line, 2 hots and a neutral. You should know how to get away beside a 1/0 copper neutral. You will hold to follow the manufacturers specs as to how hulking of a wire you can fit beneath the breaker lugs. There is a crimp that will downsize the wire to fit the breaker. It is available at most electrical supply houses. You will want the tool to crimp it also. This tool you can most likely borrow from the supply house, or possibly rent it from a rental center.
Hope this help.