IMC installation...

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chevyx92

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VA BCH, VA
Alright all you RMC and IMC installers. I have a job coming up where I will be running 1 1/2" IMC and I was just wondering if you had any tips as far as with bends and pre-fabbed 90's. I'm havent run much IMC or RMC so I'm a rookie with it. So I guess my biggest questions are how do you thread a piece of pipe into a coupling if you have an offset or a 90 and every time you turn it, it hits the wall? Is there some trick that I need to know? Thanks for the input, as easy as it might be. :grin:
 
Cool

Cool

Hey I need a new piece of that someone used my bender as a pri-bar...:rolleyes:
Oh shoot 1.5" ...

Come on its like riding a bike!

I just don't strap the first piece till I have three together, and work forward and backward, accordingly ...
 
You need to think ahead how the 90's will spin on. Some times you have to use just a 90 and then keep running from it. You can sometimes assemble ahead of time.
IMC is a bit harder to thread than RMC, its "tougher".
Running IMC and RMC is all about workmanship. Use of 3 pc couplings is sometimes necessary.
 
You can't use those fittings in a hazardous location.
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Sorry, my psychic abilities are on the fritz :)

I remember years ago using a threaded "union" style connector designed for electrical conduit. It worked basically like a plumbers union but was more stealthy....not a lot bigger than a regular coupling.


To compensate for the scenario you described, you could stand the conduit off the wall with deep strut to give yourself room to screw it together.
 
Threader Oil pot a must. Xproof unions are available. But the trick is to lay out the run so you use as few expensive fittings as possible, a well layed out job is 1/2 done.
 
  • You are going to find that IMC will kink a bit in a bender and has some spring back, its hard to correct a bend unlike rigid
    lube the shoe with slip stick, yellow 77 or something like that.
  • Use new sharp dies for threading and dont skimp on the threading oil.
  • I would use the IMC as much as I could for straight runs but use rigid for any of the bending.
  • Also you might find that IMC wont work well with some brand of compression couplings
 
You could do what the plumbers do and that is use left-hand threads on one end of the pipe and a special coupling designed for left/right hand threads. Home Depot has them in the smaller sizes.
~Peter;)
 
You must become one with the pipe young grasshopper....see the pipe....envision the run....become the pipe.

There is no real way to tell you how to run the pipe...it's all in the planning....planning that includes supports, pull points, etc.
 
celtic said:
You must become one with the pipe young grasshopper....see the pipe....envision the run....become the pipe.

There is no real way to tell you how to run the pipe...it's all in the planning....planning that includes supports, pull points, etc.
Click to expand...
Thats not really what I was looking for. I know that. I'm talking what you do when you need to couple a piece that has a 90 or an offset on it and it hits the wall or something. How can you twist a 90 on if its smacking the wall? I guess from what others said you have to start with the 90?
 
peter said:
You could do what the plumbers do and that is use left-hand threads on one end of the pipe and a special coupling designed for left/right hand threads. Home Depot has them in the smaller sizes.
~Peter;)
Click to expand...
Plumbing fitting on electric conduit? Too many left handed cigarettes?
 
chevyx92 said:
Thats not really what I was looking for. I know that. I'm talking what you do when you need to couple a piece that has a 90 or an offset on it and it hits the wall or something. How can you twist a 90 on if its smacking the wall? I guess from what others said you have to start with the 90?
Click to expand...

Sometimes....you have to start the run with at the 90?...sometimes you have to peel the straight pieces off the wall/support for "swing room"....if you have a multitude of runs on the same rack with occasional runs dropping out sporatically - you may have to give the "drop-outs" a jump start on the remaining runs.
 
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