First 400a residential service out on my own, 315 ft from the new pole the utility set. We are required to install a meter pedestal for services farther than 200 ft.
Installing 2 200 amp panels
1. Based on NEC 2017 section 225.32 would you consider that meter pedestal a structure. If so it would require a disconnecting means? I have figured 2 emergency disconnects at the building already but the inspector did not give me a straight answer whether he considered that a structure.
2. Grounding - 250.66 gives me #4 GEC based on ungrounded conductors of 4/0 AL (parallel 4/0 from the pole to the meter). The only GEC I have is a UFER at the structure, so I would need to run 315 ft of #4 back to the first disconnecting means if I were required to have disconnects on the meter pedestal.
If the 1st pair of disconnects are not required then my largest ungrounded conductor would be a 300kcmil AL and I would need #2 based on that table. However, 250.66(B) states when connected to a single or multiple concrete-encased electrodes, the grounding electrode conductor can be as small as 4 AWG copper if it doesn't extend to other types of electrodes that require a larger conductor.
My interpretation is that #4 is the answer regardless of conductor size.
Looking for some feedback on this and If I may be missing something
Installing 2 200 amp panels
1. Based on NEC 2017 section 225.32 would you consider that meter pedestal a structure. If so it would require a disconnecting means? I have figured 2 emergency disconnects at the building already but the inspector did not give me a straight answer whether he considered that a structure.
2. Grounding - 250.66 gives me #4 GEC based on ungrounded conductors of 4/0 AL (parallel 4/0 from the pole to the meter). The only GEC I have is a UFER at the structure, so I would need to run 315 ft of #4 back to the first disconnecting means if I were required to have disconnects on the meter pedestal.
If the 1st pair of disconnects are not required then my largest ungrounded conductor would be a 300kcmil AL and I would need #2 based on that table. However, 250.66(B) states when connected to a single or multiple concrete-encased electrodes, the grounding electrode conductor can be as small as 4 AWG copper if it doesn't extend to other types of electrodes that require a larger conductor.
My interpretation is that #4 is the answer regardless of conductor size.
Looking for some feedback on this and If I may be missing something