- Now - the kicker - if in the event of a fault actually inside the nipple between the two enclosures - the fault may disconnect or damage grounded service conductor inside it. If only bonded downstream from the fault, this current then only has one non-qualified way to go - back to the source through the regular ol' locknut at the meter base.
I bond only one side of the nipple with a ground bushing, but I run the bonding jumper through the nipple out to the enclosure without a ground bushing and bond that enclosure also.
Three points of contact with one jumper: Both enclosures and one side of the nipple.
The alternative is two jumpers and two bushings; one for each enclosure. This method is okay as well.