We recently purchased a water cooler but when I plugged it it, we noticed a faint flickering on all lights on the same circuit. They don't flicker when it is unplugged but as soon as I plug it in to any outlet on the circuit they flicker.
I'm lost as to what could be causing it or how to troubleshoot.
Anything you can do to help would be appreciated.
I suspect that the loose connection has always been there and has become visually apparent because of the increased current draw in the circuit.
Method of troubleshooting;
Flickering lights, is a symptom of aching within a connection, which can become a fire hazard.
The prevalent cause of residential fires, attributed to electrical, is loose connections.
Make sure that all joined conductors, anywhere in the system they occur, are first twisted together prior to applying a wire nut, do not just stuff the conductors into the wire nut and hope.
Commercial straight blade receptacles are available in 2 basic configurations in the method of attaching the conductors, back and side or side. (I refer to the back wired as, plug-n-play, and do not use them). It was a method availed as a time saver.
Industrial receptacles are a different product.
I also will pigtail all recepticle connections, so that should there be a failure, the circuit can be shut off, the recepticle can be safely removed and the circuit turned back on, while those appliances up and downstream of the failure will remain operational.
If you are not familiar with working behind the dead front panel of you electrical service panel, hire an electrician.