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#97636 - 03/10/06 12:28 AM table 300.5  
ngoody24  Offline
Joined: Sep 2005
Posts: 33
pace,FL, United States
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.



2017 / 2014 NEC & Related Books and Study Guides

#97637 - 03/10/06 12:51 AM Re: table 300.5  
gfretwell  Offline

Joined: Jul 2004
Posts: 9,103

Greg Fretwell

#97638 - 03/10/06 12:58 AM Re: table 300.5  
ngoody24  Offline
Joined: Sep 2005
Posts: 33
pace,FL, United States
my answer was 4" so is the 2005 table different than the 2002 table?

#97639 - 03/10/06 06:55 AM Re: table 300.5  
Tiger  Offline
Joined: May 2005
Posts: 706
Crystal Lake, IL USA
ngoody 24

Table 300.5 is the same (2002 & 2005) in Column 2 (RMC & IMC).

All locations not specified below...6".


#97640 - 03/10/06 09:17 PM Re: table 300.5  
ShockMe77  Offline
Joined: Jun 2005
Posts: 821
Rahway, New Jersey
That's one of the nice things about using rigid - not having to dig as deep!

#97641 - 03/11/06 09:07 AM Re: table 300.5  
electure  Offline

Joined: Dec 2000
Posts: 4,260
Fullerton, CA USA
The 6" cover requirement was first called out in the '71 or '75 NEC, and hasn't changed since.

#97642 - 03/11/06 11:31 AM Re: table 300.5  
renosteinke  Offline
Cat Servant
Joined: Jan 2005
Posts: 5,316
Blue Collar Country
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.

#97643 - 03/11/06 12:41 PM Re: table 300.5  
gfretwell  Offline

Joined: Jul 2004
Posts: 9,103
Good point about the plumber. Rigid is tough stuff but no match for a 14" chop saw.

Greg Fretwell

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