Overhead Cables Installed in Trench

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Anonymous Poster	Overhead Cables Installed in Trench 11/22/2010 4:48 AM
	My boss ( I think he is from syria or lebanon ) asked to install over head cables in trench direct buried. Is it possible?....
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Anonymous Poster	#1 Re: Overhead cables 11/22/2010 7:06 AM
	Hi, what type of cable you want to buried underground? Regard's
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lyn Guru Join Date: Oct 2008 Posts: 42355 Good Answers: 1693	#2 Re: Overhead cables 11/22/2010 8:32 AM
	We'll have to know if it's Syria or Lebanon before we can give you an answer.
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PWSlack Guru Join Date: Jan 2007 Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on. Posts: 32175 Good Answers: 839	#3 Re: Overhead Cables Installed in Trench 11/22/2010 10:07 AM
	<...Overhead cables buried in trench....> Surely lynlynch can do something with this one? __________________ "Did you get my e-mail?" - "The biggest problem in communication is the illusion that it has taken place" - George Bernard Shaw, 1856
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Tornado Guru Join Date: May 2009 Location: Richland, WA, USA Posts: 21017 Good Answers: 795	#4 Re: Overhead Cables Installed in Trench 11/22/2010 12:36 PM
	If your boss stands on his head, maybe it will be okay. More seriously, examine what insulation type the cable actually is. Some kinds may be suitable for either overhead or buried installation. The amperage capacity may differ for the two situations. __________________ In vino veritas; in cervisia carmen; in aqua E. coli.
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wareagle Guru Join Date: Jun 2008 Location: Alabama Posts: 1604 Good Answers: 63	#5 Re: Overhead Cables Installed in Trench 11/22/2010 2:37 PM
	As Tornado said, all cable are not rated to be used underground due the the insulation on the cable. I have retrieved some of the insulation from the NEC for you. Damp Locations. Insulated conductors and cables used in damp locations shall be Types RHW, RHW-2, THHN, THW, THW-2, THHW, THWN, THWN-2, TW, XHH, XHHW, XHHW-2, Z, or ZW. Wet Locations. Insulated conductors and cables used in wet locations shall be Types MTW, RHW, RHW-2, TW, THW, THW-2, THHW, THWN, THWN-2, XHHW, XHHW-2, ZW Notice the cables have a W included to indicate wet locations.
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dqnghia Participant Join Date: Nov 2010 Posts: 1	#6 Re: Overhead Cables Installed in Trench 11/22/2010 9:15 PM
	That's not a good idea, because of many issues you have to due with before installation - first is water ingress, second is mechanical protection, third is arcing between phases, if it is HV cable...
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Anonymous Poster	#7 Re: Overhead Cables Installed in Trench 11/22/2010 11:55 PM
	The question is. "is it possible" well hell yes it's possible you can bury barbed wire if you want what happens to it afterwards is...well... gotta use your own shovel though my wife's using mine
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Anonymous Poster (2); dqnghia (1); lyn (1); PWSlack (1); Tornado (1); wareagle (1)

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