Bryan ,I don't think i've ever been accused of being 100% correct. As a matter of fact, feel free to correct me.
You see, I don't believe all the PPE in the world will provide the safety of simply shutting off the hazard.
Although this is practiced by means of the employer's claim that power could not be interupted, any contractor stands on this vs. production downtime.
Being said individual in the past,i did not like that choice.
I beleive the intital installation should either have isolating means for maintanence, or a shutdown is in order.