What I have is meter stack 6 - 200A meters 208/120V three phase.
All please see attched pictures from NEC 2014 handbook. The pictures show equipment grounding bar bonded to the service can either thru wire or green screw not neutral bar. The netural bar is bonded thru main bonding jumper to equipment grounding conductor bar and service can. This is Option B but you are saying Option A is correct? How is this possible?
The “service can” is required to be grounded
Metal conduits connected to the metal can are approved types of equipment grounds
The main bonding jumper by definition is the bond between the neutral and the equipment grounding
We in discussion have addressed three types of main bonding jumpers
The wire type
The busbar type
The green screw type
All three of the above are approved main bonding jumpers to bond the neutral to the equipment grounding, which includes the metal service can and any metal conduit attached to the can
The connection of the grounding electrode conductor is a different discussion
The neutral must shake hands with the grounding electrode conductor if you will.
(direct bond)
There is however an allowance to extend that direct connection by using two of the main bonding jumpers, the busbar type, or the wire type.
The green screw is not approved for that bond, I like the fact that the screw is required to be green because we associate green with equipment grounding and actually bonding between the neutral and equipment grounding system is all that the green screw is approved for.
If you use an equipment ground bus to bond the neutral to the grounding electrode conductor you must first ensure there is an approved main bonding jumper of the wire or busbar type extending the the direct bond between the two