Take the 2-minute tour ×  After having issues with lights
flickering, I noticed the main 100A breaker was warm and arcing
slightly. Instead of just replacing the breaker, I decided to
call in a electrician to install a larger panel with spaces for
more breakers, as I was planning to install an air conditioner
in the future.  He said the existing ground wire wasn't long
enough, so he connected it to the metal wall of the panel with
something that looks like a miniature bus with one screw.
(sorry, I forgot exactly what it was called)  Is it really safe
to do this? Is there any advantage/disadvantage to connecting
the grounding wire to the metal casing of the panel instead of
directly to the neutral bus?  share|improve this question Most
panels have a neutral bus and a ground bus both of which are
connected to each other, the service entrance neutral, and the
panel. All of this is bonded to the grounding electrode.
However, without knowing exactly what he did, what brand panel
it is, and your location, it's impo