J-Box vs Condulette 2

[insitebuilders]

.
I wonder if someone could explain under what conditions one would spec/use/install a condulette (conduit body) rather than a standard j-box or pull box in a commercial bldg? Is it perhaps based on the number of wires to be spliced? Is there a magic number?

Also are there specific advantages/condition for the use of one or the other?

Thanks again for any help...

/Dennis

 

[davidbeach]

Pull points, and means of low radius turns. Splices may be permitted in conduit bodies but belong in j-boxes.

 

[insitebuilders]

.
Thx David

So a conduit body is only there to facilitate the pull and change direction abruptly, not for a splice...that makes sense. I couldn't see the reason to use one before since a J-box seemed simpler, even for a change in direction (if there were a splice).

Thx again

/D

 

[dpc]

Condulets have a much lower profile than a J-box, and as David says, allow you to make a 90 deg turn in a much tighter radius than an elbow.

 

[insitebuilders]

D/DPC

OK, thanks again.

/D

 

[peebee]

Sometimes, the condulet radius is TOO small -- that is, you may well end up with a bending radius that is too small for the cable being pulled. This is true not only with "L" fittings, but also with straight "C" condulets -- you still need to pull the cable out then back in for a straight pull using a C fitting as a pull point, which means you're forming a U-shaped loop which becomes very tight radius when you try to get the cable back inside the fitting....

 

[dpc]

peebee,

Check out Crouse-Hinds "mogul" LBD and LBNEC condulets for greater radius.