Plus, you don’t need the aggravation of pulling wire through skinny conduit and tighter bends.I have worked lots of jobs and facilities that 3/4 was the min. Interestingly I rarely saw anyone pull another wire in any of the conduits. The stories I got were, in case you needed to add a circuit.
It might be silly to pull two wires through 1/2 when you can push it through 3/4 with a little bit of lube.I've definitely used 1/2" EMT in commercial before. IIRC, it was in scenarios where exposed lighting required octagon boxes with 1/2" knockouts.
It also feels really silly to me to run 3/4" if you're only pulling 2 wires.
The difference in cost is almost 60%. If you have the opportunity to use 1/2” you certainly should.I think this is one of those old wives tales that people start to believe are in the NEC or CEC. 3/4 bends about as easy as 1/2 and the cost difference is marginal and if you only run 3/4, you only need to keep 1 size of fittings. So after a while guys just begin to think it's a rule.
When you have one of those oh boy moments, you can pull severalteen #14s in them to get you out of a jam.