In article
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" wrote:

We recently had one burnt electrical outlet at our office. The
appliance plug is also burnt as well. All the outlets at our office is
rated at 20Amps and have fuse protection. The fuse did not trip.
Anyone has a clue why the outlet and the plug are burnt? I am planning
to just replace the burnt outlets and the appliance plug, but I really
prefer to know what caused the burning in the first place.

Here are 2 photos showing the plug and the outlet:

http://www.flickr.com/photos/54230006@N07/5341105173/
http://www.flickr.com/photos/54230006@N07/5341718398/

Thanks

Been following this thread for a couple of days, and agree with most of
what's been said. But you seem to have an absolute rat's nest of wiring
there. I suggest you hire a licensed, competent electrician to replace
the plug and outlets, and attend to any other FUBAR wiring in the
vicinity. The pics you posted look like a symptom of a much broader
problem.