Conduit Bodies

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Alwayslearningelec said:
What are the most common conduit bosies you use? I would say LB followed by C or T. Correct? Thanks.
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hey, Alwayslearningelec,

So am I.

Yes , I agree with you, but with a few more thoughts about LBs, etc.

There's the aluminum form, LB and LL, LR, T condulet and C condulet, and I think there's a service condulet or service entrance elbow, the opening is oblong.
These are either aluminum or gray iron or PVC.

Don't forget the 'jake el' that's known as a short radius conduit body as per 314.16 (C ) (3),some call it "close ells"
You young guys ever seen one? For going around corners where space is tight and small conductors.

How to identify the LL from the LR?
Hold the conduit body in your hand as if were a gun and if the opening is on your right ,it's an LR.
If the opening is on your left, it's an LL, opening on the top is a C conduit body, a T conduit body has three openings for 3 raceways.

Thanks for reading,
TX+MASTER#4544
 
LB, T, TB, X, and then Cs.
Rarely use Cs for other than a flex connection to a solenoid valve where I need to make a splice between the field wiring and the solenoid valve's wires.
This is from my industrial experience where we are using LFMC to connect to instrumentation, and yes we use the LFMC connectors with the female threads of the conduit bodies, even though they have not been evaluated for that purpose.
 
infinity said:
Definitely LB then C, after that T or TB, LL, LR. Almost never X.
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Don pointed out a use of C's but what do you use them for? I actually don't recall ever using a C. Maybe to meet a pull point requirement but not actually using it? (If I had a pull point I was actually going to use, I would probably just use a box, unless maybe it's an aesthetic thing)
 
electrofelon said:
Don pointed out a use of C's but what do you use them for? I actually don't recall ever using a C. Maybe to meet a pull point requirement but not actually using it?
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Yes as a pull point when using small conductors (#12 or #10) and to satisfy the 360° rule. Depending on the fill and length of the runs we will probably pull through it if possible. We also use them to pull in the wire before the entire run is complete like outside of an electric closet before the panels are installed.
 
Then you have the 4" mogul Aluminum LB's or Appleton 4" pulling elbows. Make sure and check the prices of those puppies before submitting your estimates :)
 
LarryFine said:
View attachment 2570386 View attachment 2570387
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While that would make the installation much easier, unless it complies with the dimensions required for an angle pull in 314.28 or is marked with the maximum sized and number of conductors permitted, it is a code violation. I also see it as a violation of 300.18(A).
 
don_resqcapt19 said:
While that would make the installation much easier, unless it complies with the dimensions required for an angle pull in 314.28 or is marked with the maximum sized and number of conductors permitted, it is a code violation. I also see it as a violation of 300.18(A).
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Them using it for fiber in the picture might be how they're showing off the product in a compliant way. If the fiber is only being protected from bellow grade to inside the Masonry it's not a complete conduit section just a form of mechanical protection.
 
letgomywago said:
Them using it for fiber in the picture might be how they're showing off the product in a compliant way. If the fiber is only being protected from bellow grade to inside the Masonry it's not a complete conduit section just a form of mechanical protection.
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The description talks about "larger service entrance wire". It is clear that they intend this fitting to be used for power conductors.
 
don_resqcapt19 said:
While that would make the installation much easier, unless it complies with the dimensions required for an angle pull in 314.28 or is marked with the maximum sized and number of conductors permitted, it is a code violation. I also see it as a violation of 300.18(A).
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The way some of the mogul LBs are designed when the cover is removed there is no "opposite wall" so I would think 314.28(A)(2) exception would apply.
 
augie47 said:
The way some of the mogul LBs are designed when the cover is removed there is no "opposite wall" so I would think 314.28(A)(2) exception would apply.
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That does not change the required 6x between the two conduit entries. That exception is only for the depth of the fitting, Pretty much every LB used with conductors 4 AWG and larger uses that exception.
 
electrofelon said:
I wonder what they are marked with for # of conductors? I don't know the process for coming up with those marked values on conduit bodies, but maybe due to the design they allow a fairly large conductor combination?
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They might, but where the distance between the conduit entries is not 6x the trade size of the raceway, the size and number of conductors permitted is required to be on the fitting. Since almost all of those combinations are for 3 conductors, the code permits a field calculation. You find the sum of the cross sectional areas of the permitted conductors, and can install any other combination where the sum of the cross sectional areas does not exceed the sum of the areas of the conductors marked on the fitting.
 
don_resqcapt19 said:
I also see it as a violation of 300.18(A).
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In this regard, I don't see it as significantly different from a pulling elbow. Although maybe the import of 300.18(A) is that you have to have the conduit strapped before installing conductors, so you can't do the maneuver shown in the first photo.

Cheers, Wayne
 
wwhitney said:
In this regard, I don't see it as significantly different from a pulling elbow. Although maybe the import of 300.18(A) is that you have to have the conduit strapped before installing conductors, so you can't do the maneuver shown in the first photo.

Cheers, Wayne
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Not sure what you are calling a "pulling elbow". What I know as a pulling elbow works just like an LB...it has a removable cover.
 
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