Came home to a tripped breaker cutting power to several lights and outlets, including the balcony. Workers had just applied a base finish to our balcony concrete that morning. The project manager was cooperative, and we agreed to wait until the finish dried. Armed with a multimeter and screwdriver I tried to isolate the problem, but no luck. Eventually, the problem resolved itself. Power washing must have penetrated the outdoor outlet, causing enough ground leakage to trip the modern AFCI breaker.
