HI i am wiring a log cabin residence. it has a 200 amp meter base panel with a main disconect on a pole. it is 600 FT from the house. the load calcs for the house spec a 100 amp panel. this is my plan i will place a 100 amp main breaker on the distribution side of the service entrance for the fire deprtment. then run 4/0 AL USE in 3 inch pvc from there to a pedistal. where a future garage will go at about 370ft mark. then back down for the other 230 ft to a main lugs only 100 amp residential load center. the MILO load center is a square D i can get a main breaker for it i think i will do that also. then i will have a ground rod at the pole and have the nutral bonded. at the house i will have a ground rod and not be bonded .
ok guys tell me whats wrong here and tell me what you would do thanks Garrcass
Well you will need 2 ground rods at each location. And depending if you are on 05 or not you may need a 4-wire service , Try this http://www.csgnetwork.com/voltagedropcalc.html for a voltage drop.
If it we're mine I would set a 200 amp feed through panel on the pole. Then run 100 amp to the garage and 200 to the house. But that is just me. :wink:
That way you won't have to worry about the 100 amp breaker. See some times, say your total load on the house is 80 then with the garage it might go to 90 these 100 amp breakers will some times heat . And they are prone to nussance tripping too, due to lightning and surges that sort of thing.
Good luck and let us know what you used.
So we can critizie the heck out of you.:smile: Just kidding. It's all in fun, and the guys & girl are real helpful.
But that voltage drop calculator is great, too.
For the distance of 600 feet I think it would be insane to run 4/0 alum, I would run at least 500 MCM alum to the garage and then drop down to a 4/0 alum to the house.
Voltage Drop CalculatorDesired Solution: ---Conductor SizeCircuit Distance Phases: ---SingleThree Conductor: ---CopperAluminum Installation: ---Direct BuriedConduitOverhead Voltage:voltsMaximum voltage drop:%Length of cable run:feetConductor Size: --- Current:ampsSolution: 1 conductor(s) per phase utilizing a 600 kcmil Aluminum conductor will limit the voltage drop to 2.7% or less when supplying 100 amps for 600 feet on a 240 volt system.
For Engineering Information:
340 Amps Rated ampacity of selected conductor
0.041 Ohms Resistance (Ohms per 1000 feet)
0.039 Ohms Reactance (Ohms per 1000 feet)
7.2 volts maximum allowable voltage drop at 3%
6.47 Actual voltage drop loss at 2.7% for the circuit
0.9 Power Factor
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i forgot to calculate both ways on the voltage drop this is going to be expensive ! i actually looked at the service entrance panel today and it is actually a feed through panel with 250 KCM lugz gona need a lug kit. I also picked up a main breaker conversion kit for the QO square D load center 125 A. so this conduit run would have more than 360 degrees of bends in it. that's one reason for wanting to set a Pedistal where the future garage will be. i shouldint need to get the plans revized right its just like a pull box but bigger ?
Well you will need 2 ground rods at each location.
