#4 AWG copper acceptable for grounding?

[Jmharrig]

I know NEC says minimum of #6 is all that is needed for grounding to metallic water pipe; however, just want to be sure. #4 copper AWG is acceptable as well, correct?

 

[roger]

Please update your profile to tell us what your occupation is.

 

[LarryFine]

I know NEC says minimum of #6 is all that is needed for grounding to metallic water pipe; however, just want to be sure. #4 copper AWG is acceptable as well, correct?

Welcome to the forum.

No, #6 cu is the maximum size required for made electrodes (rods, driven pipes, plates, etc.)

The minimum size required for water-piping depends on the service size; it's #4 cu for 200a.

 

[petersonra]

Welcome to the forum.

No, #6 cu is the maximum size required for made electrodes (rods, driven pipes, plates, etc.)

The minimum size required for water-piping depends on the service size; it's #4 cu for 200a.

I thought it was dependant on the size of the service conductors, not the rating of the service.

 

[LarryFine]

I thought it was dependant on the size of the service conductors, not the rating of the service.

I sort of equated the two. I'm sure you're correct.

 

[infinity]

I know NEC says minimum of #6 is all that is needed for grounding to metallic water pipe; however, just want to be sure. #4 copper AWG is acceptable as well, correct?

Actually the minimum size is #8. You can use any larger size conductor if you wish.