why "maintain X ft clearance around doors"?

[dpopiz]

I see this all over the place...usually in front of something "high voltage":
"maintain X ft clearance in front of doors"

what's the purpose of this warning?

 

[Pepsi90919]

so you'll nef about it on off topic

 

[MercenaryForHire]

So that if they need to be opened, pronto, there's not 32987lbs of crap in the way that you have to move before you throw the master switch.

- M4H