Conduit installation in framing members

[braiansore]

358.30(B) Guides you on how to install EMT in horizontal run within framing members by refering you to 342.30(B)4. If you are running multiple conduits ,as with a pipe rack ,can you stack the multiple conduits in the same joist space or do you have to use a separate joist for each conduit run?
Thanks for the help..

 

[celtic]

If you are running multiple conduits ,as with a pipe rack ,can you stack the multiple conduits in the same joist space or do you have to use a separate joist for each conduit run?

You can stack them...just as long as they are properly supported.

 

[dcl34769]

Is this in a ceiling? Sounds like you want to use the ceiling joists in place of a strut rack. If that is the case, and it is secured properly, then I see no reason why you can't do that.

 

[braiansore]

Properly supported at each end 3 feet from box or termination point and supported at least every 10 feet by way of joist or framing member. No problems with laying them on top of one another? Is there a code reference for the spacing of conduit?

 

[braiansore]

I an open ceiling in a large printing facility. Everyone looks down except the inspector.

 

[celtic]

No problems with laying them on top of one another?

Just as long as they are supported

Is there a code reference for the spacing of conduit?

I think common sense takes over (ok, too lazy to even look up a reference )...you need enough space for the starps and tighening of couplings....now when you get to a JB, that's another story - lock nuts, bushings, etc. (314.28).8)8)

 

[celtic]

umm...it won't let me say 314.28

 

[braiansore]

I know it wont be pretty but this question came to me from a co-installer who has his/her old ways of doing things . I'm 3 years into the trade and remembered reading the code for allowing this type of install ............I opened my mouth and the sparks just started flying....Always trying new things that others are less willing to try ....Old dog hates new younger tricks I guess

 

[celtic]

I'm 3 years into the trade and remembered reading the code for allowing this type of install

I can't remember anything anymore
Try this:
]Online Access to National Electrical Code? Softbound 2005 Edition (NFPA 70)]

............I opened my mouth and the sparks just started flying....Always trying new things that others are less willing to try ....Old dog hates new younger tricks I guess

It's bound to happen..again and again and again...and then one day, you'll turn around to some apprentice and say something like "Shut your pie-hole, I have underwear older than you!" ....and then you'll see the light and help the kid out instead of ripping his head off

 

[braiansore]

That's all we can hope for . Thanks for the help Celt.

 

[celtic]

That's all we can hope for . Thanks for the help Celt.

As you can see...I've already had the "Shut yer pie-hole" moment

Your welcome Brian (?)

Come back often...you'll learn more than most guys have forgotten.

 

[dcl34769]

I always tell my help to make suggestions. Gets their brain to start thinking outside the 4" sq. box.

 

[drg]

Brian in your 4th post you asked " No problems with laying them on top of one another?"
Can you explain a little more about that?

Using a conduit to support another conduit is a problem!
Im not sure of the arrangement you are using when you asked if was ok to stack one conduit on top of another.

John

 

[braiansore]

Stacking of conduits inside the ceiling joists. Lets say five separate coduits lying on top of one another horizontally across the framing members.342.30(B)(4) alows the installation of conduits in this manner , but what about multiple conduits?

 

[drg]

I was going to say you cannot "piggyback" the conduits on top of each other.

A example would be using 2 minerlacs back to back.

 

[LarryFine]

Stacking of conduits inside the ceiling joists. Lets say five separate coduits lying on top of one another horizontally across the framing members.342.30(B)(4) alows the installation of conduits in this manner , but what about multiple conduits?

Sounds like a job for strut and strut straps.

 

[Pierre C Belarge]

310.15(B)(2)(b)

(b) More Than One Conduit, Tube, or Raceway. Spacing
between conduits, tubing, or raceways shall be maintained.

It does not mention the spacing.
As an inspector, I would look for spacing for straps, or the fittings, as has already been mentioned.

Stacking raceways on top of each other without some sort of spacing would not be permited. One way of stacking raceways that is very common is in trenches with "chairs".

 

[allenwayne]

I can't remember anything anymore
Try this:
]Online Access to National Electrical Code? Softbound 2005 Edition (NFPA 70)]



It's bound to happen..again and again and again...and then one day, you'll turn around to some apprentice and say something like "Shut your pie-hole, I have underwear older than you!" ....and then you'll see the light and help the kid out instead of ripping his head off

I see you have used that same line I had a helper that said I was older than dirt what did we walk on back then ??Without breaking stride I turned and said WATER ,any more stupid questions?????

 

[celtic]

I see you have used that same line I had a helper that said I was older than dirt what did we walk on back then ??Without breaking stride I turned and said WATER ,any more stupid questions?????

Sometimes the comment is serious...many times, at least with me now, it's done in fun - just to keep the kid on his toes....I had an apprentice that I asked the same question to every day for a week:

You got a minute? (I would usually try and look all puzzled like I need his help )

Sure enough, he'd drop what he was doing and come running over like he was going to solve life's mysteries right then and there...

...then I would say: Go *&@^ yourself!

If he didn't fall for it EVERY DAY for an entire week I would have stopped....but he continued trying to solve life's mysteries

Finally, one day I asked him : Got a minute?
He told me : Go *&@^ yourself!

LOL

It's gotta go both ways or it's no fun.

 

[Dave58er]

358.30(B) Guides you on how to install EMT in horizontal run within framing members by refering you to 342.30(B)4.

Hi Brian, I must be missing something in my code book because I don't have this refference. Are you in '05?