The following pictures show the result of a simple line to ground fault on a 277 volt lighting circuit.

You can see the plastic switch housing melted from the heat.

Luckily the cover plate was in place when this flashed, all that happened to the person that turned the switch on was a good scare.

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[This message has been edited by iwire (edited 04-06-2004).]


Bob Badger
Construction & Maintenance Electrician
Massachusetts