The answer to 'outlet installation making buzzing noise' is that a buzzing noise coming from an electrical outlet is often caused by a loose or faulty connection. This can be due to improper installation, wear and tear over time, or even a problem with the wiring in the wall.
Some common symptoms of a buzzing outlet include a low-pitched humming or buzzing sound, flickering lights, or a warm outlet cover. If you experience any of these issues, it's important to address the problem promptly to prevent potential fire hazards or further damage to your electrical system.