Shawshill

There is no where it says its OK to do it, there was no where that said you can't do it prior to 2008. 250.32 Buildings or Structures Supplied by a Feeder(s) or Branch Circuit(s) (B) Grounded Systems. (1) Supplied by a Feeder or Branch Circuit. An equipment grounding conductor, as described in 250.118, shall be run with the supply conductors and be connected to the building or structure disconnecting means and to the grounding electrode(s). The equipment grounding conductor shall be used for grounding or bonding of equipment, structures, or frames required to be grounded or bonded. The equipment grounding conductor shall be sized in accordance with 250.122. Any installed grounded conductor shall not be connected to the equipment grounding conductor or to the grounding electrode(s). Exception: For installations made in compliance with previous editions of this Code that permitted such connection, the grounded conductor run with the supply to the building or structure shall be permitted to serve as the ground-fault return path if all of the following requirements continue to be met: (1) An equipment grounding conductor is not run with the supply to the building or structure. (2) There are no continuous metallic paths bonded to the grounding system in each building or structure involved. (3) Ground-fault protection of equipment has not been installed on the supply side of the feeder(s). Section 250.32(B) requires the installation of an equipment grounding conductor with all feeders and branch circuits that supply a building or structure. Using the grounded conductor to ground equipment, in lieu of installing a separate equipment grounding conductor, creates parallel paths for normal neutral current along metal raceways, metal piping, metal cable sheaths or shields, and other metal structures such as ductwork. Installing an equipment grounding conductor with the supply circuit conductors helps ensure that normal circuit current is not imposed on continuous metal paths other than the insulated grounded or neutral conductor. At a building or structure supplied by a feeder or branch circuit, the equipment grounding conductor is connected to the grounding electrode system [unless the installation complies with 250.32(A), Exception] in the equipment supplied by the feeder or branch circuit. Where installed, the grounded or neutral conductor is electrically isolated from the equipment grounding conductor and any grounding electrodes at the building or structure supplied by the feeder or branch circuit as illustrated in Exhibit 250.19.

Read it again. This is a subpanel in the house, not a separate garage. What you just posted is wrong, AFAIK. Does not matter, answer applies to a feeder(sub) panel, or a separate structure. In the 2008 NEC it does not allow to re-bond after the service( 1st over current device).

This was a change in the 2008 NEC 250.32, if it was installed before this code went into effect it would be grandfathered. Also correct a (4) wire would have to be run to the panel or there will be nothing to carry the fault current.

It depends on if it is a feeder or service, different articles pretty much same info. FEEDER 225.31 Disconnecting Means 225.32 Location The disconnecting means shall be installed either inside or outside of the building or structure served or where the conductors pass through the building or structure. The disconnecting means shall be at a readily accessible location nearest the point of entrance of the conductors. For the purposes of this section, the requirements in 230.6 shall be utilized SERVICE 230.70 General Means shall be provided to disconnect all conductors in a building or other structure from the service-entrance conductors. (A) Location. The service disconnecting means shall be installed in accordance with 230.70(A)(1), (A)(2), and (A)(3). (1) Readily Accessible Location. The service disconnecting means shall be installed at a readily accessible location either outside of a building or structure or inside nearest the point of entrance of the service conductors. (2) Bathrooms. Service disconnecting means shall not be installed in bathrooms. (3) Remote Control. Where a remote control device(s) is used to actuate the service disconnecting means, the service disconnecting means shall be located in accordance with 230.70(A)(1).