Grounding electrode conductor size requirement

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anbm

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Designer
Can anyone suggest what size of grounding electrode conductor
we can use to bond things listed under these three sections?:?

250.104(B) & (D)

250.194 (A)
 
are you asking about bonding conductors ?
250.104(D) I believe gives your sizing in the Article and 250.194(A) gives you an IEEE reference.
 
anbm said:
Can anyone suggest what size of grounding electrode conductor
we can use to bond things listed under these three sections?:?

250.104(B) & (D)

250.194 (A)
Click to expand...

250.104 is for bonding

B) is for "other metal piping" and says the bonding jumper must be sized per the equipment grounding conductor of the circuit likely to energize the piping. There are multiple options of where it may run to.

(D) is for bonding to separately derived systems, parts 1 and 2 both say the conductor needs to be sized to 250.66 part 3 is for a common conductor running between separately derived systems -might be most popular use on a high rise type building, it sends you to 250.30(A)(6) for more details - I believe when using this it will usually be 3/0 copper conductor for the common conductor but connections to individual SDS's would still be based on 250.66.
 
kwired said:
250.104 is for bonding

B) is for "other metal piping" and says the bonding jumper must be sized per the equipment grounding conductor of the circuit likely to energize the piping. There are multiple options of where it may run to.

(D) is for bonding to separately derived systems, parts 1 and 2 both say the conductor needs to be sized to 250.66 part 3 is for a common conductor running between separately derived systems -might be most popular use on a high rise type building, it sends you to 250.30(A)(6) for more details - I believe when using this it will usually be 3/0 copper conductor for the common conductor but connections to individual SDS's would still be based on 250.66.
Click to expand...

Thank you, any thoughts for 250.194 (A)? will #6 copper wire be adequate for this bonding?
 
anbm said:
Thank you, any thoughts for 250.194 (A)? will #6 copper wire be adequate for this bonding?
Click to expand...

Not all that familiar with this section but looks like 250.190 is what tells you the size and (C)(1) would limit you to 6 AWG as smallest size, but could need to be larger if 250.122 calls for it.
 
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