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Underground Elec - direct-burial vs in conduit
Jim Brown,
What kind of armor was on that MV line?
I've installed conduit many times for medium or high voltage lines and in every case, they encased it in red concrete, so as to warn/protect future backhoe operators (or whoever) that might come in contact with it...That higher voltage stuff is extremely dangerous and will destroy anything or anyone who gets a hold of it...It doesn't just shock / kill you, it literally 'blows you up' !!!
Never heard of 10kv though (usually it was 4160, 16kv, 34.5kv, etc), so maybe they got something different going on where you're at..
As to which I'd go with...it would depend on the distance....in conduit, it's easier to replace, but direct burial can be 'repaired'....
At 1700 feet, repair would be much cheaper than replacement, I would think...Usually if there is a fault in UG cable, they will disconnect it, and hook up a signal generator to one end...then they can follow the cable from above ground using a detector (looks like a metal detector). HWere the signal stops, is your fault...You dig it up and then they make these special splicing kits, which include these molds which you fill with expoxy to create an unimpeachable container for the splice...
There are also test devices that allow you to hook up to one end, and they will tell you the distance from that end to the fault, but you have to know the exact path of the cable to make that info useful..
So for runs of a couple hundred feet or less, I would lean towards conduit, but anything longer, I would go the Direct Burial route....
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