Irreversible connector
- Thread starter eds
- Start date
- Status
- Location
- Bremerton, Washington
- Occupation
- Master Electrician
A crimp connector for solid copper may not be available and for that size difference
hillbilly1
Senior Member
- Location
- North Georgia mountains
- Occupation
- Owner/electrical contractor
Is it for the GEC or EGC? If it is for an EGC, it doesn’t have to be irreversible, an inline mechanical splice can be used. Just curious, as AL is not commonly used as a GEC.
- Location
- New Jersey
- Occupation
- Journeyman Electrician
I agree with Tom that given the different material types and the large size disparity it might be difficult to find. I'm not saying that no one makes such a thing but you might not be able to get one. You might have to use several crimps in increments to get from 2/0 to #4.
Out of curiosity what is the application? You could always use a grounding bus to make the connection.
Out of curiosity what is the application? You could always use a grounding bus to make the connection.
Feeder to a seprate building, disconnect on exterior of building with 4/0 ser feeding a mainlug panel. Wanting to utilize the 2/0 equipment ground as the g.e.c as this seems to be allowed by the exception (2017 nec). Need to continue on from the panel location to the water service entrance, was looking for a crimp connection to go from 2/0 to #4 solid bare
- Location
- Chapel Hill, NC
- Occupation
- Retired Electrical Contractor
Don't they make reducers for those connections?
- Location
- New Jersey
- Occupation
- Journeyman Electrician
yesterlectric
Senior Member
- Location
- PA
- Occupation
- Electrician
H tap connectors are more commonly used in utilities but may work on your application. The specific one I referenced here isn’t UL listed but is CSA listed. You may look at what Burndy or others have.
Only have the 2020 at my desk, but we are on the 2017. 250.121 exception
I have thought about those, but i am not sure they are listed for grounding
texie
Senior Member
- Location
- Fort Collins, Colorado
- Occupation
- Electrician, Contractor, Inspector
Meter and main panel are located on another structure, the building in question has a disco on the outside where the feeder terminates. From this disconnect, 4/0 ser is then installed to a main lug panel. Building has a copper water service, but no ufer. With the ser containing a 2/0 equipment ground, I was going to use it for both an equipment ground and the g.e.c. One to save on cost, and two to spend lest time in the crawl space.
- Location
- Bremerton, Washington
- Occupation
- Master Electrician
A H tap is a good option if listed. I didn’t have an H tap tool until late in my career as the tool and die is more expensive than compression tools
kwired
Electron manager
- Location
- NE Nebraska
- Occupation
- EC
H tap will have one to take the right combination of conductors, but I kind of doubt any them would be listed for grounding.
- Occupation
- Licensed Electrician
You can't just crimp copper to aluminium can you?
kwired
Electron manager
- Location
- NE Nebraska
- Occupation
- EC
H taps have separate grooves for each conductor and accept copper or aluminum conductors, but they likely not listed for what OP wants to do.
- Location
- Bremerton, Washington
- Occupation
- Master Electrician
A grounding bus bar may be the best solution. Then single hole compression lugs. to bolt to bus bar
drcampbell
Senior Member
- Location
- The Motor City, Michigan USA
- Occupation
- Registered Professional Engineer
Cadweld a 2/0 Cu stub to the end of your 4 Cu, then crimp 2/0 to 2/0.
yesterlectric
Senior Member
- Location
- PA
- Occupation
- Electrician
Unless you’re going direct burial, within 18 inches of earth, or buried in concrete connections used for grounding don’t have to be specifically listed for grounding and bonding. They just need to be listed.
- Status