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permanent earth ground, such as a properly grounded
receptacle box.
In all cases, make certain the receptacle is properly
grounded. If you are not sure, have a qualified
electrician check the receptacle.
CAUTION
!
Fig. 1
Fig. 2
Three-Pronged Plug
Grounding Prong
Properly Grounded
Three-Pronged Receptacle
Grounding Lug
Make sure this is
connected to a
known ground.
Two-Pronged
Receptacle
Adapter