Equipment Grounding and Grounded Conductors Termination

[cripple]

I would like your opinion on the following statement.

Section 250.142(A) permits the use of grounded circuit conductor for grounding equipment on the supply side of the service in three locations:

(1) On the supply side or within the enclosure of the ac service-disconnecting means
(2) On the supply side or within the enclosure of the main disconnecting means for separate buildings as provided in 250.32(B)
(3) On the supply side or within the enclosure of the main disconnecting means or overcurrent devices of a separately derived system where permitted by 250.30(A)(1)
One and two does permit the equipment grounding and the grounded conductors to terminate on the same buss.
The third location being on the secondary side of a separately derived system the equipment grounding conductors are required to be terminated on a separate buss, which is bonded to the grounded conductor by the system bonding jumper.

 

[benaround]

cripple,

250.30(A)(1) allows the connection to be made at the 1st OCPD, which can

be a Main Circuit breaker Panel. If the neutral and system bonding jumper

are both brought to this panel, they all land on the neutral bus as do all the

branch circuit neutrals and EGC's. This is not a very common installation I

might add.

 

[cripple]

Equipment Grounding and Grounded Conductors Termination

My reason for my posting is to try to clear up a question that came up at work. The question was ?can the equipment grounding conductors be terminated on the neutral buss on the secondary of SDS like at the service if the system bonding jumper is located at the main circuit breaker panel, since both location have a bonding jumper (service main bonding jumper, SDS system bonding jumper) at performs the same function??
My first thought was yes, but after reading 250.30(A)(1) and was pointed out it is very clear that the system bonding jumper is to connect the equipment grounding conductors of the separately derived system to the grounded conductor.
Any and all input is appreciated.
Thank again.

 

[don_resqcapt19]

250.24(B) Main Bonding Jumper For a grounded system, an unspliced main bonding jumper shall be used to connect the equipment grounding conductor(s) and the service-disconnect enclosure to the grounded conductor within the enclosure for each service disconnect in accordance with 250.28.

250.30(1) System Bonding Jumper An unspliced system bonding jumper in compliance with 250.28(A) through (D) that is sized based on the derived phase conductors shall be used to connect the equipment grounding conductors of the separately derived system to the grounded conductor. This connection shall be made at any single point on the separately derived system from the source to the first system disconnecting means or overcurrent device, or it shall be made at the source of a separately derived system that has no disconnecting means or overcurrent devices.

The wording for services and SDSs is amost the same. I see no reason why the EGC cannot land on the neutral bus of the SDS.
Don