George,
Let's say that it does have secure support within 12" of the conduit terminations. What triggers your question?
In most installations of the type that you are talking about there is no support and the only way that you can install the raceway without such support is where flexiblity is required. Then you must have a bonding jumper. I think that even the normal motor vibrations are enough to trigger the bonding jumper requirement even if there is support within the 12"...it is just very clear that the bonding jumper is required when there is no installed support.
Don
