Conduit Re-Route/Offset

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mstrlucky74

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NJ
There are (7) 4” conduits rising up 12 floor and a pull box on each floor. Two of the conduits( the last two to the right) are empty and they want them separated from the box as they will have fiber on them. I suggested a barrier and they said no, they want a separate box. There is about 2’ of space to the right of the box and I was thinking maybe a pencil box. This happens on very floor. My question is how would one remove these two conduits and “offset” them to a new box right next to the existing box? Didn’t really get good pic of the right side of the box where the empty conduits are. Thanks.
 

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Cut the EMT near the upper slab and lower slab bend your offsets and install them with the new box next to the existing box. You'll need one slip coupling on each run. Simple job, BTW it looks like there is already a barrier in the box.
 
infinity said:
Cut the EMT near the upper slab and lower slab bend your offsets and install them with the new box next to the existing box. You'll need one slip coupling on each run. Simple job, BTW it looks like there is already a barrier in the box.
Click to expand...

It looks like two barriers actually. This question just raises questions for me. First and foremost is, who is going to pay for this? That this happens on 12 floors makes a difference. It makes no sense to me that a barrier isn't OK, I could see if it was CAT 6 and they were worried about radio interference but with fiber it makes no sense. If they are paying for it, then I would probably do what Infinity said on the first floor. The other box doesn't have to line up so your new offset can be whatever it needs to in length. Fro there up, I would probably core new holes and just run new straight pieces of conduit and leave the existing in the existing box. I wouldn't try to offset on every floor.

If I were footing the bill, I would partner with a sheet metal company and figure out a way to cut off the box and put a new sidewall on it. and then either mount a wireway or make another box for the fiber.

I would be complaining the whole time.
 
infinity said:
Cut the EMT near the upper slab and lower slab bend your offsets and install them with the new box next to the existing box. You'll need one slip coupling on each run. Simple job, BTW it looks like there is already a barrier in the box.
Click to expand...

Inf, are you saying after you cut the pipe, then remove the piece attached to the box, attached your bent offset with the coupling? Thanks
 
mstrlucky74 said:
Inf, are you saying after you cut the pipe, then remove the piece attached to the box, attached your bent offset with the coupling? Thanks
Click to expand...


Yup, basically you remove the straight piece and replace it it with two offsets to route the conduit outside of the box.
 
infinity said:
Yup, basically you remove the straight piece and replace it it with two offsets to route the conduit outside of the box.
Click to expand...

Thought so, thanks. Also, since its 480v very close I'd imagine it would be smart to do this while the feeders are shutdown.?
 
Strathead said:
It looks like two barriers actually. This question just raises questions for me. First and foremost is, who is going to pay for this? That this happens on 12 floors makes a difference. It makes no sense to me that a barrier isn't OK, I could see if it was CAT 6 and they were worried about radio interference but with fiber it makes no sense. If they are paying for it, then I would probably do what Infinity said on the first floor. The other box doesn't have to line up so your new offset can be whatever it needs to in length. Fro there up, I would probably core new holes and just run new straight pieces of conduit and leave the existing in the existing box. I wouldn't try to offset on every floor.

If I were footing the bill, I would partner with a sheet metal company and figure out a way to cut off the box and put a new sidewall on it. and then either mount a wireway or make another box for the fiber.

I would be complaining the whole time.
Click to expand...

The engineer( the fiber engineer) said because the power is 480V and he's worried about interference.
 
mstrlucky74 said:
Thought so, thanks. Also, since its 480v very close I'd imagine it would be smart to do this while the feeders are shutdown.?
Click to expand...

Looks like there is a barrier in the box already to isolate it from the existing feeders. Just close the box and cut out the pipes from the outside.
 
mstrlucky74 said:
The engineer( the fiber engineer) said because the power is 480V and he's worried about interference.
Click to expand...
They would be better off to spend the $$ on a new engineer...
"
"Optical fibre is not affected by magnetic of electrical fields. At least none that you'll find outside high-energy research labs."
 
augie47 said:
They would be better off to spend the $$ on a new engineer...
"
"Optical fibre is not affected by magnetic of electrical fields. At least none that you'll find outside high-energy research labs."
Click to expand...

Wow, can you imagine an engineer saying this. Oops look ou,t that light travelling through the glass is going to distort!
 
augie47 said:
They would be better off to spend the $$ on a new engineer. ...
Click to expand...
Hear, here!
My first question would be "Is this useful or necessary?" Maybe, to separate the low-voltage technicians' fingers from line voltage.

Strathead said:
... If I were footing the bill, I would partner with a sheet metal company and figure out a way to cut off the box and put a new sidewall on it. and then either mount a wireway or make another box for the fiber. ...
Click to expand...
If somebody insists on a separate box, make a barrier with bolt flanges. Cut the box cover into two pieces. Badda boom, badda bing, two boxes. (with a common sidewall)
 
Just punch out the box change one connector to a coupling the other to A split coupling. Done.
 
drcampbell said:
Hear, here!
My first question would be "Is this useful or necessary?" Maybe, to separate the low-voltage technicians' fingers from line voltage.


If somebody insists on a separate box, make a barrier with bolt flanges. Cut the box cover into two pieces. Badda boom, badda bing, two boxes. (with a common sidewall)
Click to expand...

There already is a barrier in the box.

If they were accepting the barrier then I would just cut the cover so that the new fiber section can be opened without accessing the 480 section at the same time. If they want it separate then just give them what they want since they're paying for it. :)
 
infinity said:
There already is a barrier in the box.

If they were accepting the barrier then I would just cut the cover so that the new fiber section can be opened without accessing the 480 section at the same time. If they want it separate then just give them what they want since they're paying for it. :)
Click to expand...

I asked but I didn't see where he indicated who was paying for it.
 
infinity said:
There already is a barrier in the box.

If they were accepting the barrier then I would just cut the cover so that the new fiber section can be opened without accessing the 480 section at the same time. If they want it separate then just give them what they want since they're paying for it. :)
Click to expand...

Inf, how could one possibly offset the conduit to a new box next to it. The bend/offset would be way to "sharp" for the bottom conduits. Aren't they too close too the box? The top conduits seem to have enough space. And like most of you inferred, I'm sure a much easier/practical solution will be implemented.
 
mstrlucky74 said:
Inf, how could one possibly offset the conduit to a new box next to it. The bend/offset would be way to "sharp" for the bottom conduits. Aren't they too close too the box? The top conduits seem to have enough space. And like most of you inferred, I'm sure a much easier/practical solution will be implemented.
Click to expand...

Sorry but you're photos stink so it's hard to tell if offsets will work, they may if you have the overall height and length. There are several ways to do this, offsets, core drill, or even a custom pull box.
 
infinity said:
Sorry but you're photos stink so it's hard to tell if offsets will work, they may if you have the overall height and length. There are several ways to do this, offsets, core drill, or even a custom pull box.
Click to expand...

Plus, while most of us are type A personalities :p so our minds got straight to the boxes lining up, they don't have to. The box can be raised so the lower conduit has longer to offset.
 
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