Posted by JD Seller on February 09, 2016 at 20:19:30 from (208.126.198.123):
About eight years ago I updated the cattle yards at the farm. Part of this project was removing the overhead wiring and putting it all under ground. This included the service to the silos and some grain bins. That part is a 400 AMP service run.
Well last night my son called me and said he did not have any power at the silos. So he finished feeding out of the silage bags. This morning I went over and check things over looking for the problem. One leg of the 220 Volt feed is dead/shorted to ground.
Now the "fun" part. This main feed is 1400 feet from the supply panel. All of the wires are ran underground inside of a 4" schedule 80 PVC conduit. We dug a four feet deep trench and then filled the bottom one foot with sand. This we compacted and laid the conduit an back filled in layers compacting the fill is layers to ground level. So the conduit should be protected from external damage. The real problem is that over 900 feet of this run is under the cattle yard extension, six inch thick concrete slab. So I sure hope the issue is just a bad spot in the insulation on the wire.
So I went and got a 2000" roll of 5/16 cable. This is what we pulled the original wires through the conduit with. So in the morning we will try to pull the existing wires out with the cable tied/clamped to them. If it is just bad wires I will just pull new ones back with the cable.
How we pulled the cable the last time we attached a snach block about fifty feet up the silo. We then ran the cable up and over that. We pulled the cable with a small tractor. It took a long day to pull it in. I bet that it will take longer coming out. Plus it is fifty degrees colder now too.
The middle son is giving me heck about burying the electric service. Well there were several CLOSE calls with augers and blower pipes around the overhead wires.
So if you want some fun come on out. You can help guide wires and cable. The high tomorrow is supposed to be 8 degrees. I sure hope the wind lays. It howled all day today making the wind chill pretty bad.
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