I’ve just read through all of these posts and I’m currently a domestic spark (house basher) insult that is. I went from commercial/industrial about 10 years ago and I was clueless at domestic and was taught how to install in the domestic environment I’ve never looked back since with work and £££ to be earned I’ve just done a 2 bed upstairs flat Rewire with my work colleague/friend and earned nice amount for 8 hours work. I then received a phone call from customer saying 2 of his neighbours want a Rewire from myself end of day money talks and this has been the case for past 10 years earnt significant amount more being domestic spark I’m comparison to commercial/industrial also I’ve had to sort out many faults of the com/ind spark could not find ?More so these days, yes. It all depends on the work and conditions, though. Industrial can be tough and much 'dirtier' than domestic.
As a contractor, I used to do work at a silver recovery plant, installation of new machines and services, as well as maintenance. Methods of recovery involved chemicals and the burning of x-ray plates. Never worked in worse condition, working on the burners...black as the ace of spades and absolutely shattered every night. Fault finding on breakdowns was a nightmare, everything covered in black dust and mostly in awkward spots behind the units......plus the almost unbearable heat, whilst masked up.