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#121916 - 08/30/05 07:43 PM EMT- Burial Depth Necessary Near Sidewalk?
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Loc: NY, USA
 Quote:
How deep need EMT be under a cememt walk? Or, can the walk itself act as 'running boards' to protect it?

Also- does the extensive rusting of the EMT where the elbow enters the ground perhaps suggest that EMT might not be appropriate at all?

There was no grout- to expose the pipe, I simply needed to use a broom. Nor was the walk completely cut- it appears that someone simply put an abrasive blade in a circular saw, and made several passes, as deep as the saw would go.

- renosteinke

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#121917 - 09/01/05 05:29 PM Re: EMT- Burial Depth Necessary Near Sidewalk?
alan bergold Offline
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Registered: 11/20/01
Posts: 51
Loc: east meadow ny
EMT IS NOT SUPPOSED TO BE INSTALLED UNDERGROUND...
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JBIELECTRIC EAST MEADOW NY

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#121918 - 09/01/05 06:07 PM Re: EMT- Burial Depth Necessary Near Sidewalk?
DSpanoudakis Offline
Member

Registered: 08/31/05
Posts: 88
Loc: Astoria, Queens, N.Y.C.
PVC
Rigid Nonmetallic Conduit (RNC)
Type UF cable (except in direct contact with poured concrete 340.12(8))
Rigid Metal Conduit (RMC)
Intermediate Metal Conduit (IMC)

can be used underground, plus anything else I left out that someone wants to chime in.

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#121919 - 09/01/05 06:33 PM Re: EMT- Burial Depth Necessary Near Sidewalk?
renosteinke Offline
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Registered: 01/22/05
Posts: 5305
Loc: Blue Collar Country
Considering the lack of depth, is this truly "under" ground? :-)

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#121920 - 09/01/05 09:11 PM Re: EMT- Burial Depth Necessary Near Sidewalk?
DSpanoudakis Offline
Member

Registered: 08/31/05
Posts: 88
Loc: Astoria, Queens, N.Y.C.
From most of the illustrations I've seen, they always placed the piping at least under the actual slab, not just a few inches from the top. It looks like dirt under there, I'd say remove as much as you can and get as deep as you can, then run it.

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#121921 - 09/01/05 10:36 PM Re: EMT- Burial Depth Necessary Near Sidewalk?
Trumpy Offline

Member

Registered: 07/05/02
Posts: 8540
Loc: SI,New Zealand
Interesting picture John.
Putting metal conduit in damp soil is just asking for trouble.
Over here, we have a rule that states no underground cables, pipes or wires shall be buried less than 600mm (2ft) below grade.
With a plastic marking strip at half trench depth.
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Let's face it, these days if you're not young, you're old - Red Green grin

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#121922 - 09/01/05 11:27 PM Re: EMT- Burial Depth Necessary Near Sidewalk?
skingusmc Offline
Member

Registered: 05/27/04
Posts: 116
Loc: Simi Valley, CA USA
2002 NEC Table 300.5 give minimum cover requirements.

Depth depends on what you are using and what it is burried under.

Steve

PS - I would never us EMT underground and would rather use PVC (the electrical use gray, not the sprinkler white)and be sure to use the sweeping 90 degree PVC peices and not the "condulets"
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Thanks
Steve

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#121923 - 09/02/05 05:41 PM Re: EMT- Burial Depth Necessary Near Sidewalk?
alan bergold Offline
Member

Registered: 11/20/01
Posts: 51
Loc: east meadow ny
the wole picture is a hack.. that pedestrian walkway could be easily undermined why take all the time to cut it when you could just go under in half the time and it costs le$$
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JBIELECTRIC EAST MEADOW NY

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