Grounding electrode conductor continuous or not

[roger]

250.104(A)(1) refers to Table 250.102(C)(1), not Table 250.122.

Cheers, Wayne

Depends on what your year you're looking at, 2017 is 250.122

 

[wwhitney]

Depends on what your year you're looking at, 2017 is 250.122

2017 and 2023 both refer to Table 250.102(C)(1) in 250.104(A)(1), although 2023 adds a 3/0 Cu maximum size.

Cheers, Wayne

 

[roger]

Oooops, I was actually looking at 2011 which is 250.122 and 2014 was the same.

 

[kwired]

So on 200A service if there is plastic water pipe 2 ground rods with #6 conductor is sufficient?

If there also is no CEE or structural metal that qualifies as an electrode then yes.

 

[ctaylo360860]

Another illustration showing multiple jumpers and one GEC.

View attachment 2563302

So are the jumpers sizes on 250.66, and a250.53(c) Looks like the gec to from service to underground metal water pipe water should be sized #4 ? since the service has 3/0 ungrounded conductors.

same with bonding jumper going to the concrete encased electrode which doesn’t have to be any larger than #4 and #4 to the ground ring based on 250.66 and the 3/0 ungrounded service conductors?

The bonding jumper that goes from underground metal water pipe to the structures metal would you use 250.104(c)? Which then tells you to size based on 250.102(c)(1)? Which again would be #4. Then from the structure you can jump to the single ground rod with #6?

This is all done using 2017 book and conductors are all copper.