Three apartment home, two apt are on one panel, home is about 25 - 35 years old I think. When washer is "washing" all the lights flicker, as if from theinductance from the washer motor. Add a Kettle, & then hair dryer, the lights dim quite a bit, with the flicker also present. Another friend has the same problem, with a new washer, so it's not a bad washer. I'm thinking bad main ground at the water pipe, on the buss bar ground in the panel, or a loose contact in the outside meter. I haven't done any measurements yet. Will I need an RMS meter, to see the "pulsing"? Or will an oscilloscope let me see the fluctuations? Thanks, Dani.