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Remove
fuse or trip circuit breaker to off for particular room of the house. Test
to be sure you have correct circuit by plugging a lamp into the
receptacle.
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Unscrew
and remove face the plate.
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Unscrew
the mounting screws at top and bottom and pull the unit out.
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Notice
how wires are connected and connect them to the new unit the same way. All
white wires are connected to the side with a silvery color and the black
wires to the brassy terminals.
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A green
grounding wire might be connected on newer systems so be sure to reconnect
this wire also.
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Reassemble the outlet doing steps above in reverse order.