Minimum 90 degree bending radius for EMT conduit

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Tainted

Tainted

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New York
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Engineer (PE)
I am running 3/0 THWN-2 in 2-inch EMT conduit. How do I figure out the minimum EMT bending radius for a 90 degree bend?

Do I go to table 2 chapter 9? I don't really understand what "One Shot and Full Shoe Benders" means and what it's referring to with "other bends"
 
2" emt is bent with a hydraulic bender that has a shoe that will determine the bend. Are you going to be doing the bends? The other option is to buy pre-made 90's.
 
Yes table 2 in Chapter 9 is what you would use.

I believe a one shot bender is what you normally see on hand held benders. They make those one shot benders for hydraulic also.

358.24 Bends — How Made. Bends shall be made so that the
tubing is not damaged and the internal diameter of the tubing
is not effectively reduced. The radius of the curve of any field
bend to the centerline of the tubing shall not be less than
shown in Table 2, Chapter 9 for one-shot and full shoe benders.
Click to expand...
 
Dennis Alwon said:
2" emt is bent with a hydraulic bender that has a shoe that will determine the bend. Are you going to be doing the bends? The other option is to buy pre-made 90's.
Click to expand...
Based on table 2 chapter 9, the minimum bending radius for 2-inch EMT conduit is 12". Some pre-bent conduit I found online have less than 12" radius for some reason.

See this as an example:
https://rexel-cdn.com/products/cond...og.pdf?i=F0EA5773-88B7-467B-8F8D-79FADE32A393

The one above has a radius of 9.5" for 2-inch EMT. How come?
 
There are one shot bends and segment bends. As Dennis stated the one shot is as it implies a single bend with a one shot shoe. Segment bends require that you move the conduit in the bender after bending a fraction of the 90.
 
Dennis Alwon said:
That 12" is for other bends. The one shot and full shoe is 9.5"

View attachment 2566199
Click to expand...

infinity said:
There are one shot bends and segment bends. As Dennis stated the one shot is as it implies a single bend with a one shot shoe. Segment bends require that you move the conduit in the bender after bending a fraction of the 90.
Click to expand...
Ah I see... I have another stupid question. You know how you cannot have more than 360 degree bends? A pullbox resets this rule, but does a conduit body reset this too?
 
Tainted said:
I have another stupid question. You know how you cannot have more than 360 degree bends? A pullbox resets this rule, but does a conduit body reset this too?
Click to expand...
Depends on the wire size. Often a C conduit body will not allow you to pull large conductors in and out of the CB.
 
infinity said:
Depends on the wire size. Often a C conduit body will not allow you to pull large conductors in and out of the CB.
Click to expand...
Only reason I prefer 90 degree bends instead of conduit bodies is that conduit bodies needs to be accessible. In my particular case I'm trying to make sure I minimize the need for access panels and make sure I don't compromise aesthetics of the building.
 
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