Emt as protective sleeve

[Pinnie]

Where does code allow emt as protective sleeve. It’s not in 300.4(b)(1) like I would think. There’s an exception in 300.18 but I’m looking for something more explicit.

 

[infinity]

Either of these sections: 334.15(B), 300.4(F).

 

[Pinnie]

Either of these sections: 334.15(B), 300.4(F).

Anything more directly applicable to low voltage cable in particular?

 

[infinity]

Anything more directly applicable to low voltage cable in particular?

Do you mean can EMT be used for the protection or are the cables required to be protected?

 

[Pinnie]

Do you mean can EMT be used for the protection or are the cables required to be protected?

I think 300.4(b)(1) requires me to protect low voltage cable through metal studs but the only permitted methods listed are listed grommets/ bushings. I want to use emt.

 

[roger]

The better question would be "where does code prohibit emt as a protective sleeve"

 

[Pinnie]

The better question would be "where does code prohibit emt as a protective sleeve"

I would think under uses permitted in 358 it should be stated

 

[Pinnie]

The better question would be "where does code prohibit emt as a protective sleeve"

Also it’s not stated as a acceptable method in 300.4(b)(1)

 

[roger]

The NEC is a permissible code meaning if doesn't say you can't you can. Not everything or method needs to be specifically called out.

 

[Pinnie]

The NEC is a permissible code meaning if doesn't say you can't you can. Not everything or method needs to be specifically called out.

So if you ground or bond equipment in a method not listed in 250.8 that’s fine?

 

[roger]

So if you ground or bond equipment in a method not listed in 250.8 that’s fine?

If it is an acceptable method sure.

 

[roger]

You're making the protective sleeve thing difficult when there's no reason. What do you think about using IMC, RMC, FMC, etc....?

 

[Pinnie]

If it is an acceptable method sure.

Acceptable to who?

 

[roger]

Acceptable to who?

In your case whoever's going to tell you it's wrong

 

[Pinnie]

You're making the protective sleeve thing difficult when there's no reason. What do you think about using IMC, RMC, FMC, etc....?

I think it should be allowed. I do it all the time. I’m just trying to find the code reference because an apprentice asked me

 

[roger]

I think it should be allowed. I do it all the time. I’m just trying to find the code reference because an apprentice asked me

Then answer with post #6

 

[Pinnie]

Then answer with post #6

I like that answer in certain contexts but not when there’s a rule stating the required methods.

 

[roger]

I like that answer in certain contexts but not when there’s a rule stating the required methods.

What "required method" are you talking about?

 

[Pinnie]

What "required method" are you talking about?

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

 

[infinity]

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

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.