In article , "William Munny" wrote:
In some hospitals and office buildings, I see some electrical outlets that
are red or orange (not the outlets cover plates, the outlet itself).

What's that all about?

Red = connected to emergency power (nearly all hospitals, and many office
buildings, have backup generators in case utility power fails)

Orange = isolated ground (used for sensitive electronic equipment, usually
medical or laboratory instruments, or high-end computer gear)