“Capped elbows” etc

[Jpflex]

I believe there is a code in NEC which does not allow “capped bend apparatus” to have splices such as cutting wires and connecting with wire nuts inside of this equipment such as LB’s or RB’s “elbows”

Is the picture posted a “capped” LB? would it be allowed here?

Also there is a code regarding equipment grounding conductors made of aluminum to not be installed within 18 inches of ground but would there be a similar code for EMT as I’m not sure if there would be any aluminum content in EMT?

 

[Jpflex]

Emt within 18 inches of ground earth

 

[letgomywago]

Emt within 18 inches of ground earth

Is it bare aluminum used as an equipment ground?

 

[augie47]

(a) the NEC does NOT allow splices in capped elbows {314.16(C)(3)}
(b) the picture seems to show a conduit body and splices are if yiu follow 314.16(C)(1) & (C)(2)
(c) EMT is allowed to be aluminum but needs corrision protection if in contact with the earth or encased in concrete.

 

[retirede]

We always called them “pulling elbows”.

 

[Jpflex]

Is it bare aluminum used as an equipment ground?

It is magnetic so I don’t know aluminum content

There is an EGC in conduit but conduit serves as backup equipment ground

 

[letgomywago]

It is magnetic so I don’t know aluminum content

There is an EGC in conduit but conduit serves as backup equipment ground

Emt is legal the only requirement I could see beat to fit and isn't applicable anyway is bare aluminum conductors not being within 18 inches to ground. Unless there's a local code emt is fine.

 

[Jpflex]

(a) the NEC does NOT allow splices in capped elbows {314.16(C)(3)}
(b) the picture seems to show a conduit body and splices are if yiu follow 314.16(C)(1) & (C)(2)
(c) EMT is allowed to be aluminum but needs corrision protection if in contact with the earth or encased in concrete.

I didn’t get what you said in b) are you saying splices can be made in this lb?

 

[kwired]

I didn’t get what you said in b) are you saying splices can be made in this lb?

The mentioned (C)(3) doesn't allow splices in short radius conduit bodies like "capped ells". Is sort of redundant IMO because these short radius bodies simply don't have enough volume to allow splicing per the general rules anyway.

 

[infinity]

I didn’t get what you said in b) are you saying splices can be made in this lb?

Yes splices are permitted in conduit bodies providing you follow the code sections Augie posted.

 

[kwired]

The picture in OP is a short radius conduit body. The picture in post 5 is even shorter radius conduit body.

One could probably call either a capped ell and technically not be wrong, but what I've seen called a capped ell is usually for hazardous location fittings and looks something like:

 

[Jpflex]

The picture in OP is a short radius conduit body. The picture in post 5 is even shorter radius conduit body.

One could probably call either a capped ell and technically not be wrong, but what I've seen called a capped ell is usually for hazardous location fittings and looks something like:

View attachment 2565282

Ok thanks because this code is confusing without a picture in NEC. I haven’t been making splices in lbs just to be safe

 

[kwired]

Ok thanks because this code is confusing without a picture in NEC. I haven’t been making splices in lbs just to be safe

The ones you can make splices in will typically be marked with their cubic inch capacity and is really no different than sizing a junction or device box for fill capacity. Often there isn't much room for a lot of splicing unless you really oversize the conduit body, but sometimes is handy to have large enough T conduit bodies and pull everything through except the equipment grounding conductor and splice it in the T fittings.

 

[letgomywago]

The ones you can make splices in will typically be marked with their cubic inch capacity and is really no different than sizing a junction or device box for fill capacity. Often there isn't much room for a lot of splicing unless you really oversize the conduit body, but sometimes is handy to have large enough T conduit bodies and pull everything through except the equipment grounding conductor and splice it in the T fittings.

Sometimes when transitioning between romex to thhn when you need to be tight up to something and a bell box won't work. You have to oversize it a bit and provide the LB supplementary support since it's not supported on 1 side. Again a very specific and limited use of it but nice to have. I've heard it's more cost effective in explosion proof situations since the conduits are loaded past 25% often for the seal offs.