We usually plug our portable dehumidifier at one end of our basement
directly into a wall socket using a 3-prong adapter. The other day I
plugged it into one of those 6-outlet surge protectors in order to
place it on the other end of the basement. Well a strange burning
smell became evident fairly quickly and the rubber 3-prong adapter
melted! Does this indicate a problem with the dehumidifer or with
the surge protector strip? Thanks in advance.
It indicates that you were using an adapter that is meant for the
temporary connection of a grounded load to a grounded wiring method that
serves an old two wire receptacle as a long term substitute for the
installation of grounded receptacles. The contact blades of the
adapters are not rigidly held. I suspect that when you plugged in the
adapter the blades were not making good contact and the resultant arcing
generated the heat that melted the adapter.
The only completely safe way of using these adapters is to test for a
low impedance ground and then connect the grounding tab to the grounded
strap or yoke of the receptacle.
I also suspect that if you look you will find that the adapter was not
needed to plug into the temporary power tap that contains the surge
protector. Do you also have that three wire power tap plugged into an
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