[aftershockews]

It seems to be the requirement from AT&T to run 2" RMC for fiber optics.

I can understand the dia, but why not use EMT?

Customer needs a 70' run from the communications closet to their data room.
2x2 drop ceiling grid with 2' clearance above. Gonna be a bitch to try and get rigid in.

Could i just use EMT?

 

[Southeast Power]

No. They pay for this for a reason.
Maybe one of the RCDD types here can explain but it a certain class of installation design or something like that.
Plus, you can't get into it very easy or damage it accidentally just by bumping into it.

Btw, I have used IMC under the direction of the person signing my paycheck and was not failed for it.

 

[NJWVUGrad]

It could just be a boilerplate spec

Submit an RFI and state the issues

 

[macmikeman]

Security issue? It is spec in high security environments all the time. I don't personally see any diff between using emt and rigid steel for this, but apparently the military and FAA does.

 

[btharmy]

Get approval from AT&T for emt. I just did an install fir at&t fiber. 185' to the tele/data closet. 2" emt, all sweep 90s. Otherwise, charge a premium for rmc and make some $$$ on the deal.

 

[NJWVUGrad]

Don't assume anything/everything in Telecom is spec'd for a reason - we do alot of install/design for wireless carrier (AT&T, Verizon, etc).

If I find something that looks ridiculous I question them and usually they will accommodate.

Except on grounding - Do whatever the hell the drawing says on grounding, if you question it you will only end up banging your head against a wall.

 

[Ty Wrapp]

As a retired AT&T Service Tech all I can say is, WOW! The specs here in the Southwest only call for a conduit, never a size or type. Must be a regional thing :confused1:

 

[btharmy]

FYI, I have seen the term "rigid conduit" used in specs only to find out they meant not to use flex or smurf tube. I would ask for clarification.

 

[KennyW]

FYI, I have seen the term "rigid conduit" used in specs only to find out they meant not to use flex or smurf tube. I would ask for clarification.

That's my guess. Whoever wrote it doesn't realize Rigid Metal Conduit has a specific trade meaning.

 

[jeffmoss26]

friend of mine who runs 3 office buildings got at&t to agree to an innerduct being placed in an existing 4" conduit from the basement to the 2nd floor phone room, then 3/4 smurf tube through 2" conduit into the hallway, and EMT into the suite.

 

[aftershockews]

Thanx for the replies. I need to speak with AT&T on this one. RMC is just gonna be way too much of a hassle. I will need to make quite a few cuts and couplings on this run since it is tight above the grid.

 

[aftershockews]

I had only did one other job like this. But it was straight up, through an open attic and 90 drop into the server room.