concrete cover

[jeramiepluemer]

Someone told me I could place wire in the ground 8 inches and put 4 inches of concrete over it. sound crazy. can someone explain this to me please.
table 300.5 says 12 inches with 2 inches of concrete is lowest.

 

[Little Bill]

Someone told me I could place wire in the ground 8 inches and put 4 inches of concrete over it. sound crazy. can someone explain this to me please.
table 300.5 says 12 inches with 2 inches of concrete is lowest.

If it's direct burial conductors, then 18" deep with 2" of concrete is the minimum. Other depths depend on the conduit type and location.

 

[jeramiepluemer]

If it's direct burial conductors, then 18" deep with 2" of concrete is the minimum. Other depths depend on the conduit type and location.

Are you familiar with the generator wire that cablemaster makes. all conductors in it

 

[jeramiepluemer]

Are you familiar with the generator wire that cablemaster makes. all conductors in it

 

[LarryFine]

Someone told me I could place wire in the ground 8 inches and put 4 inches of concrete over it. sound crazy. can someone explain this to me please.
table 300.5 says 12 inches with 2 inches of concrete is lowest.

Rigid conduit can go only 6" deep in some locations.

I have used 2" of concrete with PVC directly beneath it.

 

[jeramiepluemer]

Rigid conduit can go only 6" deep in some locations.

I have used 2" of concrete with PVC directly beneath it.

How deep would conduit be. 12 in

 

[jeramiepluemer]

How deep would conduit be. 12 in

I ask dumb question so my brain can remember. I am a rookie so be nice

 

[Little Bill]

Are you familiar with the generator wire that cablemaster makes. all conductors in it

That would be direct burial cable and would require 18" minimum depth.

 

[jeramiepluemer]

That would be direct burial cable and would require 18" minimum depth.

with 2 inches of concrete also

 

[LarryFine]

How deep would conduit be. 12 in

The top of the conduit would be just over 2" deep.

Correction: According to Table 300.5", it's 4", not 2".

Another correction: Note 5 does allow as little as 2"

 

[Little Bill]

Rigid conduit can go only 6" deep in some locations.

I have used 2" of concrete with PVC directly beneath it.

Per code, that should have been 12" deep. Inspectors here will usually let you get by with less.

 

[Little Bill]

with 2 inches of concrete also

yes

 

[kwired]

Are you familiar with the generator wire that cablemaster makes. all conductors in it

from second page of your information:

Ratings
UL THWN 600V
UL Type TC-ER-JP 600V
The insulation is acceptable for use in locations at 75 °C dry and 75 °C wet.
The cable is suitable for use in cable trays, aerial or direct burial installations.
The cable is JP rated for installation in accordance with Part II of Article 334.

Not sure what JP rated means, but art 334 is for rigid metal conduit - so it is saying to treat it same as RMC for whatever JP rated means.

That said it is pretty vague, for one thing not all of part II of 334 would apply to anything with conductors already inside.

If it can be treated like it is RMC, then 300.5 has some conditions where it could be 6 or even 4 inches deep if under 4 inches of concrete with no vehicular traffic.

 

[jeramiepluemer]

yes

liquid tight same as conduit correct

 

[readydave8]

Not sure what JP rated means, but art 334 is for rigid metal conduit - so it is saying to treat it same as RMC for whatever JP rated means.

I think the "JP" lets us use like NM, through bored holes inside structure

 

[don_resqcapt19]

from second page of your information:

Ratings
UL THWN 600V
UL Type TC-ER-JP 600V
The insulation is acceptable for use in locations at 75 °C dry and 75 °C wet.
The cable is suitable for use in cable trays, aerial or direct burial installations.
The cable is JP rated for installation in accordance with Part II of Article 334.

Not sure what JP rated means, but art 334 is for rigid metal conduit - so it is saying to treat it same as RMC for whatever JP rated means.

That said it is pretty vague, for one thing not all of part II of 334 would apply to anything with conductors already inside.

If it can be treated like it is RMC, then 300.5 has some conditions where it could be 6 or even 4 inches deep if under 4 inches of concrete with no vehicular traffic.

"JP" equals "joist pull".....additional testing in the listing process to make sure the jacket is not damage when the cable is pulled through framing members such as joists and studs.

Article 334 is NM, 344 is rigid.

 

[kwired]

I think the "JP" lets us use like NM, through bored holes inside structure

"JP" equals "joist pull".....additional testing in the listing process to make sure the jacket is not damage when the cable is pulled through framing members such as joists and studs.

Article 334 is NM, 344 is rigid.

Must need newer glasses

Shallow burial depths mentioned in OP kind of baited me a little to keep proceeding that direction too.