I found this at the ground bar at the exterior service panel for a 1996 townhome with a 125 amp GE main breaker. It appears to be a piece of metal attached to the grounding bar and then screwed into the back of the panel. I have never seen this before. I sent the pics to a friend that is an electrician and he has not seen it either.
The meter next to the service panel did have a ground wire to a grounding stake and was only connected to the service panel by large plastic conduit for the aluminum supply cables.
Is this ok?? I have been doin this 7 years and have not ran into this yet. I plan on writing it up unless I get some good solid feedback.
Yes making it all bonded. Usually metal conduit does this or the design of some brand boxes have the neutral bus bars directly attached to the box , thus not needing a strap
Yes, all metallic parts on the line side of the service disconnect (in this case the panel enclosure) are bonded to the service neutral conductor via the main bonding jumper, which can be a screw, strap or a bus bar.