Looking for code reference

[infinity]

Why would we think that iwire would install 600' of EMT underground?

 

[joebell]

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

In a run that long of EMT there is typically too much air loss from the fittings for a vacuum or blower to be effective.

 

[iwire]

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

Two? :?

Say again. What violations?

Yeah, the inspector has to provide a code cite.

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....

Just string.

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

Bingo.

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.

Man you inspectors are a suspicious group of folks ..... it's almost like you have seen some weird stuff in your duties.


I did not split the coupling like that. I just meant I split the run pipe run in half.

The expansion fitting was like this one http://www.emersonindustrial.com/en...duit/OZG_TX-Expansion-Fitting-EMT-Conduit.pdf or another brand.

You can close it up all the way to get the connector off the pipe allowing you to move one pipe to the side for snaking.

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

Expansion fitting was required by job specs.

My guess would be buried.

I assume you mean buried in a wall not buried in the dirt. But no, this was 45' up in a open warehouse space.

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)?

Yes.

314.29 Boxes, Conduit Bodies, and Handhole Enclosures
to Be Accessible. Boxes, conduit bodies, and handhole
enclosures shall be installed so that the wiring contained
in them can be rendered accessible without removing
any part of the building or, in underground circuits, without
excavating sidewalks, paving, earth, or other substance that
is to be used to establish the finished grade.

Exception: Listed boxes and handhole enclosures shall be
permitted where covered by gravel, light aggregate, or noncohesive
granulated soil if their location is effectively identified
and accessible for excavation.

He said he used 2-200' fish tapes, he tied them together to have enough length.

Pretty sure I tried that, (15 years ago now) but I know we ended up sending one 200' 1/4" snake with a open hook in from one end and sending a 200' 1/4" snake in the other way with a wad of pull sting attached to it. We had to do each half of the pipe run and the snakes hooked first try each time.

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.

Exactly, there was a building expansion joint that I crossed.

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

That would require taping up all the couplings.

Why would we think that iwire would install 600' of EMT underground?

I might run 530' of EMT underground but 600' or more is just unprofessional.

In a run that long of EMT there is typically too much air loss from the fittings for a vacuum or blower to be effective.

That is my experience.



I looked up the job on Google earth, it shows my straight run was 640' add to that about 40' up and 40' down from pull box to pull box.

In the picture below, the red arrow is a guard house that needed a 200' 480 volt feeder from a generator backed up source. The Google Earth rulers yellow line is the approximate route I ran. The green arrow indicates the building expansion joint. The blue arrow is the switchgear location the brown arrow the transformer and generator supplying the gear.

Here is the building on Google maps

 

[don_resqcapt19]

In a run that long of EMT there is typically too much air loss from the fittings for a vacuum or blower to be effective.

I have never had that issue with compression couplings, but it is an issue with set screw couplings.