tompoff43
Member
- Location
- Cincinnati
- Occupation
- Electrical designer
I have a older building that has the conduit being used as the EGC. Now that I’m doing a major remodel do I have to put in ground bus and an EGC conductor with the the feeders?
Conduit as EGC in older buildings
- Thread starter tompoff43
- Start date
- Status
- Location
- Bremerton, Washington
- Occupation
- Master Electrician
Is the feeder a type listed on 250.118? If so, no
tompoff43
Member
- Location
- Cincinnati
- Occupation
- Electrical designer
Did you mean feeder or EGC? The feeder is in conduit (one listed in 250.118).
- Occupation
- Licensed Electrician
No need for a wire EGC then.
- Location
- Tennessee NEC:2017
- Occupation
- Semi-Retired Electrician
What do you mean by saying "put in a ground bus"?
tompoff43
Member
- Location
- Cincinnati
- Occupation
- Electrical designer
Right now some of the branch circuits have EGC with them and are terminated via a screw to the panel tub. Wasn’t sure if a separate ground buss should be installed.
tompoff43
Member
- Location
- Cincinnati
- Occupation
- Electrical designer
Thanks for your help!
qcroanoke
Sometimes I don't know if I'm the boxer or the bag
- Location
- Roanoke, VA.
- Occupation
- Sorta retired........
I would use a ground bar. Most likely the screws used for the grounds are not machine thread screws and are not green.
tompoff43
Member
- Location
- Cincinnati
- Occupation
- Electrical designer
Agreed. Thanks!
- Location
- Illinois
- Occupation
- retired electrician
I would like to add another question here: what would happen if the existing conduit is underground and a continuity test shows the conduit is not operating as intended? In addition, there is no space inside the conduit to add an additional wire to be used as EGC. Thanks
- Status