"MIB" wrote in message
...

"bud--" wrote in message
.. .

As Tom wrote, there should have been a grounding electrode in the initial
installation.

As RBM wrote, the practice with a 3 wire feeder was to bond the neutral
and ground at the garage. As greg wrote, starting the 2008 NEC 3 wire
feeders are not allowed for new wiring.

It is not allowed, and for some time, to re-bond the grounded conductor
unless a "new" service is established. At no time is it allowed for the
grounding conductor to carry current. Period, end of damned story.

A lightning strike to the garage requires lightning rods for protection.

A lightning strike coming from the house (from the service wires) on the
feeder may result in the feeder wires at very different potential than
the earth at the garage. Ground rods wouldn't help equalize the potential
much. Bonding to the mesh/rebar in the floor at installation time would
be nice. A suppressor at the feeder panel in the garage would help
protect equipment in the garage.

Correct. The electrical grounding of the system is its "own" system.
Lightning protection is a separate system with strange results.


Feel free to look in up in a pre 2008 code book: 250.32