<I say that if you drive two rods 6' apart outside and bond to them, you don't have to
count the water main as an electrode requiring #4 copper. Indoor plumbing must be bonded, e.g., metal pipes, tanks, control boxes, and pumps.>
DS
The interior metal water piping system must be bonded with a conductor sized per Table 250-66. See 250-104(a)(1)
Don
