Articles about reverse polarity
The electrical power in my bedroom is off and none of the wall outlets work: How to Understand Outlet Polarity Testing, When using a outlet tester on the outlets it reads that the hot and ground are reversed.
How to Identify and Repair Reverse Polarity of an Electrical Circuit: Electrical Safety and Proper Circuit Polarity, Polarity has to do with the flow of electricity. Polarity and Outlets, Circuit Wires and Polarity.
How to Troubleshoot Home Electrical Wiring Problems: Testing Electric Circuit Wiring, Home Electrical Inspection, Upgrading Older Home Electrical Wiring.