Alwayslearningelec
Senior Member
- Location
- NJ
- Occupation
- Estimator
If your running 3/4" EMT w/ compression fitting what do you use to terminate the conduit into an LB?
Conduit to LB
- Thread starter Alwayslearningelec
- Start date
rc/retired
Senior Member
- Location
- Bellvue, Colorado
- Occupation
- Master Electrician/Inspector retired
A compression connector. Or duct tape. Whichever is easier. 
Ron
Ron
- Location
- New Jersey
- Occupation
- Journeyman Electrician
A threaded LB with a compression connector. I know it's been beaten to death but it's a technical violation due to the straight threads on the connector. Having said that no one really cares. They do make compression LB's for wet locations.
Alwayslearningelec
Senior Member
- Location
- NJ
- Occupation
- Estimator
I know I said compression fitting. Some LB's have a set screw correct? That would not able to be used of using compression fittings correct?
- Location
- New Jersey
- Occupation
- Journeyman Electrician
Not unless it's a combo set screw and threaded.
Alwayslearningelec
Senior Member
- Location
- NJ
- Occupation
- Estimator
What do you mean? With set screw you would just slide the pipe in no?
Eddie702
Licensed Electrician
- Location
- Western Massachusetts
- Occupation
- Electrician
@Alwayslearningelec
In the long distant past they made set screw LBs for use with EMT without any threads in the LB body and they made threaded LBs with no set screws.
They probably still make them that way.
But in the past, I don't know 20-30 years most supply houses and big box stores stock LBs with threaded hubs and set screws so they can be used either way. Why stock two items when one will do??
If you connect with set screws to the EMT this is for dry locations only. To use in a damp or wet location you would use WT compression connectors into the threads of the LB
In the long distant past they made set screw LBs for use with EMT without any threads in the LB body and they made threaded LBs with no set screws.
They probably still make them that way.
But in the past, I don't know 20-30 years most supply houses and big box stores stock LBs with threaded hubs and set screws so they can be used either way. Why stock two items when one will do??
If you connect with set screws to the EMT this is for dry locations only. To use in a damp or wet location you would use WT compression connectors into the threads of the LB
- Location
- New Jersey
- Occupation
- Journeyman Electrician
You missed the word "combo" they're both threaded and have set screws for EMT.
Alwayslearningelec
Senior Member
- Location
- NJ
- Occupation
- Estimator
No I didn't. What would need to be threaded?
- Location
- New Jersey
- Occupation
- Journeyman Electrician
So that is can be used with both threaded RMC and EMT hence the word combo.
LarryFine
Master Electrician Electric Contractor Richmond VA
- Location
- Henrico County, VA
- Occupation
- Electrical Contractor
qcroanoke
Sometimes I don't know if I'm the boxer or the bag
- Location
- Roanoke, VA.
- Occupation
- Sorta retired........
kwired
Electron manager
- Location
- NE Nebraska
I've seen pictures of them , maybe even seen them in big box stores. Never used one, do they actually fit EMT tight like a regular set screw fitting normally does?
Majority of small conduit bodies I use are in wet locations. Usually cost less to use a 4x4 box if in dry location though sometimes a conduit body is still the way to go.
wwhitney
Senior Member
- Location
- Berkeley, CA
- Occupation
- Retired
I think some of the responses so far have assumed that your statement "EMT w/ compression fitting" means your jobs specs or other conditions (wet location?) prohibit you from putting the EMT directly into an LB with setscrew connections, as that would not be a compression connection to the EMT. But if you are not so prohibited, that is the simplest solution.
If you are so prohibited, then you'd need an LB with a threaded entry, into which you can put a compression EMT connector. Or if you want to get fancy, you could get an EMT to NPT male adapter, e.g. "Mighty-Merge® Raintight EMT to NPT Hub Connector 3/4"
Cheers, Wayne
Eddie702
Licensed Electrician
- Location
- Western Massachusetts
- Occupation
- Electrician
EMT into a combo fitting does not fit as well as EMT into a regular emt set screw lb
That would be a new to me labor saver do you have a link?
Alwayslearningelec
Senior Member
- Location
- NJ
- Occupation
- Estimator
So if your using EMT with set screw for the job you would still us a compression connector for the LB because it's threaded inside?
LarryFine
Master Electrician Electric Contractor Richmond VA
- Location
- Henrico County, VA
- Occupation
- Electrical Contractor
Yeppers.
wwhitney
Senior Member
- Location
- Berkeley, CA
- Occupation
- Retired
I don't understand your question. Metal LBs are available with setscrew connections for EMT only, compression connections for EMT only, threaded connections for RMC, or combination threads and set-screws.
Cheers, Wayne
Eddie702
Licensed Electrician
- Location
- Western Massachusetts
- Occupation
- Electrician
@Alwayslearningelec
LBs can be bought with compression connectors built in as part of the LB usually used for wet locations usually. LBs with set screws only are used in dry locations. The "combo" LBs have set screws so you just shove the EMT in and tighten the screws for dry locations and they also have threads so you can screw in a compression connector for a wet location
LBs can be bought with compression connectors built in as part of the LB usually used for wet locations usually. LBs with set screws only are used in dry locations. The "combo" LBs have set screws so you just shove the EMT in and tighten the screws for dry locations and they also have threads so you can screw in a compression connector for a wet location