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Joined: Sep 2005
Posts: 33
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Has this table changed between 2002-2005? I've been using Stallcup's Master study guide and a question has me stumped. Here is the question "Rigid metal conduit should be buried in the ground at a minimum of __ inches?"
A)4 B)6 C)12 D)18
I am coming up with an answer different than what the study guide says I should get using this table. I am using a 2002 code book,but a 2005 study guide.
Thanks
Nathan
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Joined: Jul 2004
Posts: 9,931 Likes: 34
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Greg Fretwell
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Joined: Sep 2005
Posts: 33
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my answer was 4" so is the 2005 table different than the 2002 table?
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Joined: May 2005
Posts: 706
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ngoody 24
Table 300.5 is the same (2002 & 2005) in Column 2 (RMC & IMC).
All locations not specified below...6".
Dave
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Joined: Jun 2005
Posts: 821
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That's one of the nice things about using rigid - not having to dig as deep!
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Joined: Dec 2000
Posts: 4,294
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The 6" cover requirement was first called out in the '71 or '75 NEC, and hasn't changed since.
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Joined: Jan 2005
Posts: 5,445 Likes: 3
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The fine print of the code aside, I like things DEEP. For me, this means a minimum of being a coupl incehs deeper than the bottom of a slab, and deeper than the blade of a shovel (about 12").
Why? Because I don't want the pipe hit every time the gardner plants a flower or fixes a leaky irrigation pipe. I don't want the slab to act like "the worlds' dullest scissors" where the pipe exits. And I don't want the pipe cut when the plumber has to open up the slab to replace a drain.
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Joined: Jul 2004
Posts: 9,931 Likes: 34
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Good point about the plumber. Rigid is tough stuff but no match for a 14" chop saw.
Greg Fretwell
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Posts: 46
Joined: March 2013
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