Now days it all comes down to the bottom Dollar and ANYONE can do electrical work; lack of quality and durability is the trend. Normally you are going to get a Quality job if a Journeyman Electrician completes the job start to finish. The term Journeyman and Skilled Tradesman is used loosely today. Normally to be considered a true Journeyman or Skilled Tradesman one completes a qualified 4-5 year apprenticeship program for the particular trade.
When I first started as an electrician rigid and IMC treaded conduit was specified on a lot of jobs even in situations when EMT could have been used. It takes planning and skills to run threaded conduit. You have to plan your bends and measure correctly when installing threaded conduit, it is not like installing EMT if your bend or measurement was wrong EMT can easily be fixed by adding a nipple or cutting off the conduit. When I worked on large Industrial and Commercial jobs if an electrician had to make too many adjustments or use too many unions when running threaded pipe you got a pink slip.
For multiple reasons other trades are performing what should be done by an electrician. Since the invention of PVC and ENT I have seen the following; Outdoor lighting and parking lot lighting raceways and direct burial wire is installed by the outfit auguring and trenching. An electrician is not needed to ?Chasing the Mason? anymore when concrete block is being installed. The consensus this is very easy to install and requires minimal tools. When the conductors cannot be installed due to kinks, sharp bends, to many bends, raceway not connected due to not using glue and coming apart, using tape, or not using the correct fitting, mortar or concrete in the raceway, big rocks on the raceway when backfilling; now the electrician has to deal with it. I have also been on jobs when the HVAC contractor installs the EMT for HVAC equipment and the electrician installs the line voltage wiring.
Electrical work is not only being done by others in private industry, but also in local mucipalities and county governments have general maintenance workers and maintenance mechanics performing electrical work. When it comes to electrical inspections two inspections exist; union and non-union, but that is totally another subject.
Normally you can tell when an amateur did the work because the conduit is not level, not supported properly, many short pieces of conduit (nipples), kinked bends ect. Using FMT or MC Cable in exposed areas that normally a journeyman electrician would have installed EMT. Without proper enforcement including inspections and the increased use of these flexible wiring methods including CORD more and more work will not require an electrician anymore.