Electrician can be a very good blue collar job - if I hadn't gone to college, I'd have thought real hard about doing electrical in a trade school. I'd be sort of surprised to see it significantly automated any time in the near future, as well.

I wouldn’t even call it a blue collar job: the labor isn’t very intense, the pay is excellent, and it’s very stable; easily salariable compared to seasonal and contract work (though you can contract if you want).