Waterproofing
Actually this was considered, without going into too much detail as may be covered under OSA the reason is to do with equipment being quite old and often using fairly dated power management to pass certs.
You can't just retrofit new equipment as it would require expen$ive recertification and other action similar to medical equipment.
Believe most now have a secondary backup with its own independent power source but maybe it wasn't working?
Biting the hand that feeds IT
