> And a "safety shutoff" that requires 2 weeks of repair after it's used?

Could be if you turn off the power all the pipes and whatnot get
gummed up. It used to happen at our resin plant. You know what a
superball is ? Try to imagine one that weighs 5 tonnes, after the
polyurethane kettle pump failed. Then think how long it would take
to dig it out. Especially when your tools bounce off it !! p'twee..

There were a few Auckland manufacturers probably in that position
a couple of weeks ago, when an earth wire fell across the city's 110kV
feeder

http://www.nzherald.co.nz/section/story.cfm?c_id=1&ObjectID=10386171

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