Looking for code reference

[Windclaw]

hello to the forum I've been away for awhile and I am looking for a code reference.

I'm looking to find references that speak about whole box is approximately every 100 feet mounted in ridgid or EMT. is it a requirement of the code or just a good common practice

 

[iwire]

hello to the forum I've been away for awhile and I am looking for a code reference.

I'm looking to find references that speak about whole box is approximately every 100 feet mounted in ridgid or EMT. is it a requirement of the code or just a good common practice

Not an NEC rule at all, we commonly exceed 100' in large buildings and parking lots. I have run 3" EMT about 600' without any boxes. I split an expansion fitting in the middle of the run, fished both ways with two 200' snakes to get a pull string in, followed by a rope followed by a much larger rope.

It may be in some specifications and if you are installing conduits for data the specs may require a box at X number of feet and limit you to just 180 degrees of bends between boxes.

 

[qcroanoke]

hello to the forum I've been away for awhile and I am looking for a code reference.

I'm looking to find references that speak about whole box is approximately every 100 feet mounted in ridgid or EMT. is it a requirement of the code or just a good common practice

The only limit on length of conduit runs per the NEC is that you are limited to 360 degrees of bends.
358.26 2008 NEC

 

[K8MHZ]

Not an NEC rule at all, we commonly exceed 100' in large buildings and parking lots. I have run 3" EMT about 600' without any boxes. I split an expansion fitting in the middle of the run, fished both ways with two 200' snakes to get a pull string in, followed by a rope followed by a much larger rope.

It may be in some specifications and if you are installing conduits for data the specs may require a box at X number of feet and limit you to just 180 degrees of bends between boxes.

Just curious, how did you fish 600' of pipe with 400' of fish tape? Even with access at the middle (300') you still come up short.

 

[cowboyjwc]

Just curious, how did you fish 600' of pipe with 400' of fish tape? Even with access at the middle (300') you still come up short.

I just think he didn't want to admit to two code violations in the same conduit run.

 

[qcroanoke]

I just think he didn't want to admit to two code violations in the same conduit run.

Say again. What violations?

 

[K8MHZ]

Say again. What violations?

Depending on what he is doing with the expansion fitting, there may be a 300.18 violation.

 

[Windclaw]

THANK YOU

THANK YOU

thank you I knew I was right I need to trust my instincts more often when I couldn't find it in the code I should have trusted that you guys are great I appreciate it

 

[GoldDigger]

Depending on what he is doing with the expansion fitting, there may be a 300.18 violation.

As long as he puts the joint back together while all he has in the pipe is his pull rope, he should be OK, yes?
Barring any issues with securing/supporting the joint....


Tapatalk!

 

[K8MHZ]

As long as he puts the joint back together while all he has in the pipe is his pull rope, he should be OK, yes? Barring any issues with securing/supporting the joint.... Tapatalk!

You have a point there. It does say 'prior to the installation of conductors'.

 

[cowboyjwc]

He said split, he didn't say take apart.:happyno: Take apart, I don't have such a problem with. Split to me means something different for anyone who has had to repair a broken line and didn't want to pull the wire all the way out to repair it. I've heard.

 

[K8MHZ]

Maybe I am overlooking something obvious, but why an expansion fitting as opposed to a C-condulet?

 

[cowboyjwc]

Maybe I am overlooking something obvious, but why an expansion fitting as opposed to a C-condulet?

My guess would be buried.

 

[GoldDigger]

My guess would be buried.

If the condulet was not actually used as either a splice or a pull box, would Code still require it to be accessible (e.g. handhole)?

 

[joebell]

Just curious, how did you fish 600' of pipe with 400' of fish tape? Even with access at the middle (300') you still come up short.

He said he used 2-200' fish tapes, he tied them together to have enough length. I do not see a violation of 300.18 if the raceway was complete before he isnatalled the conductors. the post mentions the "split was made to install the pullstring. I'm sure it was complete by the time the conductors were pulled in:thumbsup:

 

[north star]

= ( $ ) =

Atta boy **joebell** ! [ Construimus Battuimus ] :bye:

= ( $ ) =

 

[cowboyjwc]

If the condulet was not actually used as either a splice or a pull box, would Code still require it to be accessible (e.g. handhole)?

I'm pretty sure that they are not listed for in ground use. But I see where you're going.

 

[K8MHZ]

I'm pretty sure that they are not listed for in ground use. But I see where you're going.

Are the expansion fittings listed for in ground use?

 

[don_resqcapt19]

Maybe I am overlooking something obvious, but why an expansion fitting as opposed to a C-condulet?

Probably either because the thermal length change in the raceway over the temperature range required the expansion joint, or the expansion joint was installed at a structural expansion joint in the building.

 

[pjholguin]

Why not use a vacuum and a mouse with a pull string attached? JMHO

Not an NEC rule at all, we commonly exceed 100' in large buildings and parking lots. I have run 3" EMT about 600' without any boxes. I split an expansion fitting in the middle of the run, fished both ways with two 200' snakes to get a pull string in, followed by a rope followed by a much larger rope.

It may be in some specifications and if you are installing conduits for data the specs may require a box at X number of feet and limit you to just 180 degrees of bends between boxes.