Look, I love bikes- I ride them, fix them, dream about them, but honestly, as a former electrician I can also acknowledge that it would be severely limiting to do that job on a bike.
If you’re working on domestic then you need a few ladders, a couple of hundred kilos of tools, at least 3 rolls of different cables, and a small shop of various outlets etc.
not to mention that ducking out to the wholesalers to pick up something to finish a job would take 1hr instead of 10 min.
Industrial electrician would just be funny - imagine cycling across town with a 500kg variable speed drive or switchboard on your pushy..
I couldn’t do the job efficiently with a sedan, let alone something with a fraction of the capacity. Also - where does the apprentice sit?