Conduit connection into the side of a PVC LB?

Status
Not open for further replies.
T

TimWA

Member
Is it a violation to hole saw and connect an additional conduit into the side of a PVC LB? What if a gasketed hub were used?
 
Last edited:
kingpb said:
I would imagine in doing so you have voided the UL rating and intended use.
Click to expand...

which is pretty strange to me. What is an LB but a type of J-box? Has a lid, accessible sides, splices are permitted in them.

I can take a regular PVC J-box with a lid and pre-formed conduit connections like an LB, and add openings with a hole saw all day long.
 
ULs position is that it is up to the AHJ to determine if the use of a product compromises it to the extent it no longer functions as listed.

I don't see a real issue but I am not a gambler and I don't like re-doing work so I would not do it.
 
TimWA said:
which is pretty strange to me. What is an LB but a type of J-box? Has a lid, accessible sides, splices are permitted in them.

I can take a regular PVC J-box with a lid and pre-formed conduit connections like an LB, and add openings with a hole saw all day long.
Click to expand...

Its only considered a J-box if Joints are made. The NEC determines when a condulet can contain joints. Not all of them can. :)
 
TimWA said:
which is pretty strange to me. What is an LB but a type of J-box? Has a lid, accessible sides, splices are permitted in them.

I can take a regular PVC J-box with a lid and pre-formed conduit connections like an LB, and add openings with a hole saw all day long.
Click to expand...

Well, for one thing, a junction box cannot use the conduit as support. An LB is not a type of J-box, anyway. It is a fitting.
 
TimWA said:
which is pretty strange to me. What is an LB but a type of J-box? Has a lid, accessible sides, splices are permitted in them.

I can take a regular PVC J-box with a lid and pre-formed conduit connections like an LB, and add openings with a hole saw all day long.
Click to expand...

An LB and a J-Box each have different definitions, so they are different.

Drilling a hole in the side of an LB would be a picture posted here on Fridays. IE we would all have a good laugh.
 
Does the NEC call an LB a "conduit body"?
That's what we call them in manufacturing.
 
AdamS said:
What do you think a box is? Lol.
Click to expand...



I was responding to your post that said 'threaded raceways'. It doesn't matter if the raceway is threaded or not. The article addresses the enclosure's method of connection, not the raceway's.

A box is not a conduit body which is defined as part of the raceway and excludes boxes. This thread is about a modification of a conduit body. Conduit bodies have different rules than other types of enclosures.

Conduit bodies are allowed to use conduit as support by exception. Other enclosures either have to be threaded or use a hub identified for that purpose. The idea is that a connector does not need to be used on a conduit body. It is 'part of the raceway'. Drilling a hole for raceway connection requires a connector and thus is not part of the raceway.

One question, does the modification of the conduit body relinquish it from the exception?

Another issue. Would the connectors be listed for use to connect a conduit to a conduit body?
 
Last edited:
K8MHZ said:
I was responding to your post that said 'threaded raceways'. It doesn't matter if the raceway is threaded or not. The article addresses the enclosure's method of connection, not the raceway's.

A box is not a conduit body which is defined as part of the raceway and excludes boxes. This thread is about a modification of a conduit body. Conduit bodies have different rules than other types of enclosures.

Conduit bodies are allowed to use conduit as support by exception. Other enclosures either have to be threaded or use a hub identified for that purpose. The idea is that a connector does not need to be used on a conduit body. It is 'part of the raceway'. Drilling a hole for raceway connection requires a connector and thus is not part of the raceway.

One question, does the modification of the conduit body relinquish it from the exception?

Another issue. Would the connectors be listed for use to connect a conduit to a conduit body?
Click to expand...
In order for a box to be support by the raceway alone, said raceway needs to be threaded (imc or rmc) and installed/ supported a certain way.That's all I was saying.
 
TimWA said:
Is it a violation to hole saw and connect an additional conduit into the side of a PVC LB? What if a gasketed hub were used?
Click to expand...

That rolling sound you heard was Laszlo turning in his grave. God rest his soul. :)
A couple of good threads were about this very subject and whether or not it violated the NEC or UL listing.
 
Status
Not open for further replies.
Top