just because he's an "electrician" doesnt mean he actually knows the theory or how a device functions.... i once had to school my now former "
licensed" boss (yes licensed electrical contractor) on the differences between a neutral/grounded conductor and a ground/EGC/grounding conductor, because in his mind they were the same since they terminated on the same bar.



smh
your electrician may only know how to install electrical and has no clue how to troubleshoot it. installing and troubleshooting electrical are 2 vastly different things and require different knowledge sets... many electricians i know couldnt troubleshoot to save their lives... but they can install **** real good!