inspector23
Senior Member
- Location
- Temecula, CA
Having a senior moment this morning, my brain has slipped a cog, and I am asking for your help.
I cannot wrap my head around 250.66 (2014).
First it states to use a GEC at the service using table 250.66.
Then 250.66(A) tells me so long as it is the sole connection to a single or multiple ground rods it is only required to be a # 6 copper.
I am thinking about a 3000-amp service. I interpret table 250.66 to mean a 3/0 copper, yet 250.66 seems to tell me I can use a #6 copper?
How can a #6 be sufficient? if it is, why would I need 3/0?
I remember it has read this way for many years, but for the life of me I am lost at the moment.
Do I need more coffee this morning? Send the grandkids home? This makes no sense to me. What am I (obviously) missing?
Thanks in advance for your help!
I cannot wrap my head around 250.66 (2014).
First it states to use a GEC at the service using table 250.66.
Then 250.66(A) tells me so long as it is the sole connection to a single or multiple ground rods it is only required to be a # 6 copper.
I am thinking about a 3000-amp service. I interpret table 250.66 to mean a 3/0 copper, yet 250.66 seems to tell me I can use a #6 copper?
How can a #6 be sufficient? if it is, why would I need 3/0?
I remember it has read this way for many years, but for the life of me I am lost at the moment.
Do I need more coffee this morning? Send the grandkids home? This makes no sense to me. What am I (obviously) missing?
Thanks in advance for your help!