neonbkw
Member
- Location
- central PA
Greetings, I am an EC building a service for an old school building converted to office use. The layout of the equipment leads me to ponder whether I can use the EGC of a 200A feeder as the GEC from the water pipe ground back to the service disconnect, if I size accordingly.
Based on the service entrance conductors, the GEC needs to be 2/0 copper. What I'd like to do is terminate this 2/0 GEC on the ground bar of a 200A MLO loadcenter located in close proximity to the water line, and upsize the EGC back to the main service disconnect where the N/G bond is located. The supplemental ground rod will be connected at this main disconnect.
So far this sounds ok in my mind, but there is more. Along side the previously mentioned main service disconnect, there is another just like it with a feeder going to a different part of the building, and along side that there is a loadcenter with a 200A main breaker acting as a service disconnect for a total of three service disconnects grouped in one area. This is where my brain starts to smoke when it comes to making sure I have the grounding electrode system down pat. I know I could just run the 2/0 all the way back to the service disconnects and make taps to each one, but I'd really like to utilize my original plan to save on time and material. Who isn't trying to save anything they can these days?
Please let me know what you think, as I'm always happy to learn something new.
Please let me know how this sounds, as this is something I have never encountered thus far. Thank you.
Based on the service entrance conductors, the GEC needs to be 2/0 copper. What I'd like to do is terminate this 2/0 GEC on the ground bar of a 200A MLO loadcenter located in close proximity to the water line, and upsize the EGC back to the main service disconnect where the N/G bond is located. The supplemental ground rod will be connected at this main disconnect.
So far this sounds ok in my mind, but there is more. Along side the previously mentioned main service disconnect, there is another just like it with a feeder going to a different part of the building, and along side that there is a loadcenter with a 200A main breaker acting as a service disconnect for a total of three service disconnects grouped in one area. This is where my brain starts to smoke when it comes to making sure I have the grounding electrode system down pat. I know I could just run the 2/0 all the way back to the service disconnects and make taps to each one, but I'd really like to utilize my original plan to save on time and material. Who isn't trying to save anything they can these days?
Please let me know what you think, as I'm always happy to learn something new.
Please let me know how this sounds, as this is something I have never encountered thus far. Thank you.