I would start by refusing to work outside my power zone.
Never start with "I refuse" or "I won't".
What I tell people to do, is have a witness nearby, and inform management that their orders will force you to work unsafely.
Ask them if they are instructing you to be unsafe.
Make them be on the record. 99% of the time, they won't be willing to force the employee, and they'll back down.
She does that and then management threatens discipline for insubordination or something?
Again, try not to directly refuse, unless they force the issue.
Start with what I said above, and only refuse to work as directed if you feel there is an
immediate threat to your health and wellbeing.
Before it even comes to that, find your steward, and lay it all out for him/her. And don't leave anything out.
What the hell is a power zone
The safety committee is still doing good work, I see.