Tom,
Thank you for your welcome to the board and for your reply. On answer #2, I understand article 250.92 to require all service equipment to be bonded together. I do not se mention of the neutral in this area. I thought that the neutral could only be bonded to ground at one point to prevent ground loops?
On my question #6, regarding 6 - 3/0 cu conductors with 2 - 3/0 neutrals in a 3" GRC service mast for a 400-amp panel with 75ยบ rated panel. The conductors are THHN. The service is 208Y/120 volts. It seems that if you count the neutrals then the wire size must be increased. What would determine if the neutrals are current carrying? I realize that if the service has a balanced load there will be no load on the neutral. Is there an article that addresses when a neutral is and isn't considered current carrying?
Thanks again,
Gregory
