Opinions sought NM inside conduit outside

[mikeames]

Is conduit that is NOT underground considered damp or wet. I know all underground conduits are considered damp / wet but is above ground considered damp and wet as well? Wheres the section that says all outdoor counduits are considered damp/wet? I only have my 05 book now and I looked up the definitions for damp and wet. What article am I missing. 334.12 alone does not do it for me.

 

[Rockyd]

I only have my 05 book now and I looked up the definitions for damp and wet. What article am I missing. 334.12 alone does not do it for me.

Buy an 08 NEC!!!


334.12 is Uses Not permitted.

334.12(B)(4) has changed.

Yup...I have an 05 and an 08

 

[Jim W in Tampa]

is the kitchen island outside?

no but the pvc will be under concrete and that is outside

 

[mikeames]

buy an 08 nec!!!


334.12 is uses not permitted.

334.12(b)(4) has changed.

I have one !!!!!

Maybe you missed the part where I wrote

I only have my 05 book now

 

[mikeames]

Buy an 08 NEC!!!


334.12 is Uses Not permitted.

334.12(B)(4) has changed.

Yup...I have an 05 and an 08

What do ya know me to.....

 

[Rockyd]

Okay, I'll show some mercy...The new verbiage says -

"In wet or damp locations."

No more 05 line of -

Where exposed or subject to excessive moisture or dampness.

 

[Rockyd]

Mike,

You need to reread Charlies rule. Don't show up to the forum with less than a full set of weapons.

 

[mikeames]

Thanks Rock fair enough. Ill take the advice. :smile:

 

[don_resqcapt19]

This issue was not completely clear in the 2005 and earlier codes. There were "experts" on both sides of the issue. That is why a proposal was submitted that resulted in 300.9 was submitted and accepted for the 2008 code.

300.9 Raceways in Wet Locations Above Grade.
Where raceways are installed in wet locations above grade, the interior of these raceways shall be considered to be a wet location. Insulated conductors and cables installed in raceways in wet locations above grade shall comply with 310.8(C).

Note that the wording applies to all above grade conduit in wet locations...both inside and outside of a structure.

 

[C3PO]

Also look at 300.5(B) and 300.9

 

[mikeames]

This issue was not completely clear in the 2005 and earlier codes. There were "experts" on both sides of the issue. That is why a proposal was submitted that resulted in 300.9 was submitted and accepted for the 2008 code.
Note that the wording applies to all above grade conduit in wet locations...both inside and outside of a structure.

That's it I remember us debating this especially with SER but I could not find it because I only have my 05 book with me now as I stated above. My 08 is at home on my cofee table. Thanks for that Don.


You could however put NM in conduit if it were inside in a dry location. Why would you want to I dont know but it appears as though you could.

 

[augie47]

You could however put NM in conduit if it were inside in a dry location. Why would you want to I dont know but it appears as though you could.

In some cases, you better. {334.15(B)}

(B) Protection from Physical Damage. Cable shall be protected from physical damage where necessary by rigid metal conduit, intermediate metal conduit, electrical metallic tubing, Schedule 80 PVC conduit, or other approved means. Where passing through a floor, the cable shall be enclosed in rigid metal conduit, intermediate metal conduit, electrical metallic tubing, Schedule 80 PVC conduit, or other approved means extending at least 150 mm (6 in.) above the floor.

 

[Hendrix]

no but the pvc will be under concrete and that is outside

OK, my head is stuck in NE, where the island NM is sometimes sleeved in pvc, but accessible in the cellar :grin:

 

[specgrade]

I should have read better. I was thinking of UF when I voted yes. NM-B a no no in wet locations (outside).

 

[georgeswe]

As far as an area overiding a NEC code.... Im not that smart Im just an electrician but the NEC is the minimum required. AHJs can make codes more stringent but cannot lower standards below of what is required per the NEC.

 

[Twoskinsoneman]

As far as an area overiding a NEC code.... Im not that smart Im just an electrician but the NEC is the minimum required. AHJs can make codes more stringent but cannot lower standards below of what is required per the NEC.

It's done all the time. a state or locality decide they don't like a new rule and don't accept it.

 

[wwhitney]

{334.15(B)}

(B) Protection from Physical Damage. Where passing through a floor, the cable shall be enclosed in rigid metal conduit, intermediate metal conduit, electrical metallic tubing, Schedule 80 PVC conduit, or other approved means extending at least 150 mm (6 in.) above the floor.

Do I understand correctly that this only applies to penetrations through a floor that are outside of a wall space? E.g. in residential this would apply to a receptacle in a kitchen island fed by NM. What is a good way to secure the necessary stub of conduit?

Thanks, Wayne

 

[NolaTigaBait]

i voted NO, but ...i do it all the time b/c it is allowed here

 

[Jim W in Tampa]

i voted NO, but ...i do it all the time b/c it is allowed here

Turning you in to the nec cops LOL

 

[LarryFine]

i voted NO, but ...i do it all the time b/c it is allowed here

That's because New Orleans doesn't get rain.