Emt as protective sleeve

[roger]

300.4(b)(1)
“…shall be protected by listed bushing or listed grommets….”

You need to go a little further, see 334.15(B)

 

[Pinnie]

That is for abrasion protection from the sharp edge of the stud it is not for protection for a screw or nail going through the cable. Low voltage cable is not nonmetallic-sheathed cable. NM cable is in Article 334.

Duh whoops. Where would you look to answer if you need to sleeve 18/2 to 0-10v dimming. That’s what he was running through a metal top plate?

 

[infinity]

The 0-10 volt cables would likely be covered under Article 725. Not that they directly apply to your installation this is about as close as you'll get: 725.3(J), 725.31(B).

 

[Pinnie]

The 0-10 volt cables would likely be covered under Article 725. Not that they directly apply to your installation this is about as close as you'll get: 725.3(J), 725.31(B).

Are you in 2023?

 

[infinity]

Are you in 2023?

Rob

Moderator

All responses based on the 2020 NEC unless otherwise noted

 

[jim dungar]

Where does code allow emt as protective sleeve.

It sounds like the OP wants to know which raceway rules apply to sleeves.

Sleeves are not covered by the NEC.

When the material is assembled into a complete raceway the NEC has a lot to say based on the material and construction of the raceway.

 

[Pinnie]

It sounds like the OP wants to know which raceway rules apply to sleeves.

Sleeves are not covered by the NEC.

When the material is assembled into a complete raceway the NEC has a lot to say based on the material and construction of the raceway.

I gotcha. So a sleeve is kind of a gray area.

 

[jim dungar]

So a sleeve is kind of a gray area.

Not really. A sleeve is not addressed at all.

 

[Pinnie]

Not really. A sleeve is not addressed at all.

But I’m sure we cant just go packing current carrying wire in a sleeve going 100’.

 

[infinity]

But I’m sure we cant just go packing current carrying wire in a sleeve going 100’.

Maybe there should be but does the actual wording exist in the NEC to prohibit it?

 

[Pinnie]

Maybe there should be but does the actual wording exist in the NEC to prohibit it?

I guess since we’re saying sleeves aren’t addressed since it’s not a complete system technically no.

 

[jim dungar]

But I’m sure we cant just go packing current carrying wire in a sleeve going 100’.

Underground boring oftens install sleeves. Concrete duct banks between manholes are usually sleeves. The EC then installs a smaller raceway like innerduct or cables into these sleeves.