The answer to 'how to test outlet installation' is to use a circuit tester or multimeter to check for proper wiring, grounding, and voltage. Start by turning off the circuit breaker that supplies power to the outlet you want to test. Then, plug the circuit tester or multimeter into the outlet and check for the following:
Proper Wiring: The tester should indicate that the hot, neutral, and ground wires are correctly connected. If not, there may be an issue with the wiring that needs to be addressed by a professional electrician.
Grounding: The tester should show that the outlet is properly grounded. If not, the outlet may need to be replaced or the grounding issue resolved.
Voltage: The tester should show the correct voltage (typically 120V in the US) when the circuit is turned on. If the voltage is incorrect, there may be a problem with the wiring or the circuit breaker.